Stifel Financial (SF) 10-Q 8 Aug 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Aug. 01, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Trading Symbol	SF
Entity Registrant Name	STIFEL FINANCIAL CORP
Entity Central Index Key	720,672
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		68,309,855

Consolidated Statements Of Fina

Consolidated Statements Of Financial Condition - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents		$ 678,054	$ 912,932
Cash segregated for regulatory purposes		150	73,235
Receivables:
Brokerage clients, net		1,364,624	1,415,936
Brokers, dealers, and clearing organizations		358,760	1,024,752
Securities purchased under agreements to resell	[1]	478,091	248,588
Financial instruments owned, at fair value		1,063,651	925,045
Available-for-sale securities, at fair value		3,455,373	3,181,313
Held-to-maturity securities, at amortized cost	[2]	3,307,970	3,038,405
Loans held for sale, at lower of cost or market		139,676	228,588
Bank loans, net		6,160,093	5,591,190
Investments, at fair value		128,332	133,563
Fixed assets, net		180,584	172,828
Goodwill		969,764	962,282
Intangible assets, net		115,253	116,304
Loans and advances to financial advisors and other employees, net		386,110	396,318
Deferred tax assets, net		133,603	225,453
Other assets		613,487	482,624
Total Assets		19,533,575	19,129,356
Payables:
Brokerage clients		821,357	842,014
Brokers, dealers, and clearing organizations		433,343	523,107
Drafts		59,938	94,451
Securities sold under agreements to repurchase	[3]	243,999	268,546
Bank deposits		12,050,474	11,527,483
Financial instruments sold, but not yet purchased, at fair value		705,577	699,032
Accrued compensation		244,731	295,354
Accounts payable and accrued expenses		370,051	400,570
Federal Home Loan Bank advances		790,000	500,000
Borrowings		105,000	377,000
Senior notes		796,296	795,891
Debentures to Stifel Financial Capital Trusts		67,500	67,500
Total liabilities		16,688,266	16,390,948
Shareholders’ Equity:
Preferred stock - $1 par value; authorized 3,000,000 shares; 6,000 shares issued		150,000	150,000
Common stock - $0.15 par value; authorized 97,000,000 shares; issued 69,690,846 and 69,507,842 shares, respectively		10,454	10,426
Additional paid-in-capital		1,784,654	1,840,551
Retained earnings		990,459	876,958
Accumulated other comprehensive loss		(25,537)	(39,042)
Total Shareholders? Equity		2,910,030	2,838,893
Treasury stock, at cost, 1,409,250 and 2,866,492 shares, respectively		(64,721)	(100,485)
Total Shareholders’ Equity		2,845,309	2,738,408
Total Liabilities and Shareholders’ Equity		$ 19,533,575	$ 19,129,356
[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 $474.1 million and $248.5 million at June 30, 2017 and December 31, 2016, 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 counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $263.8 million and $299.3 million at June 30, 2017 and December 31, 2016, respectively.

Consolidated Statements Of Fin3

Consolidated Statements Of Financial Condition (Parenthetical) - $ / shares	Jun. 30, 2017	Dec. 31, 2016
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	6,000	6,000
Common stock, par value	$ 0.15	$ 0.15
Common stock, shares authorized	97,000,000	97,000,000
Common stock, shares issued	69,690,846	69,507,842
Treasury stock, shares	1,409,250	2,866,492

Consolidated Statements Of Oper

Consolidated Statements Of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Commissions		$ 172,264	$ 182,104	$ 347,538	$ 380,034
Principal transactions		95,703	126,426	212,560	247,374
Investment banking		185,261	133,125	312,113	233,783
Asset management and service fees		172,914	144,567	335,653	289,099
Interest		108,951	65,780	209,904	128,607
Other income		7,198	17,405	15,950	24,595
Total revenues		742,291	669,407	1,433,718	1,303,492
Interest expense		16,644	17,262	32,540	31,373
Net revenues	[1]	725,647	652,145	1,401,178	1,272,119
Non-interest expenses:
Compensation and benefits		453,876	460,023	890,263	871,136
Occupancy and equipment rental		57,892	58,746	110,437	116,002
Communications and office supplies		34,192	37,426	68,036	74,086
Commissions and floor brokerage		11,232	12,145	21,955	23,876
Other operating expenses		85,257	68,012	148,270	127,313
Total non-interest expenses		642,449	636,352	1,238,961	1,212,413
Income from operations before income tax expense		83,198	15,793	162,217	59,706
Provision for income taxes		30,387	6,022	43,894	22,880
Net income		52,811	9,771	118,323	36,826
Preferred dividends		2,344		4,688
Net income available to common shareholders		$ 50,467	$ 9,771	$ 113,635	$ 36,826
Earnings per common share:
Basic		$ 0.74	$ 0.15	$ 1.66	$ 0.55
Diluted		$ 0.63	$ 0.13	$ 1.41	$ 0.48
Weighted-average number of common shares outstanding:
Basic		68,556	66,792	68,471	67,186
Diluted		80,021	75,982	80,391	76,084
[1]	No individual client accounted for more than 10 percent of total net revenues for the three and six months ended June 30, 2017 or 2016.

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 52,811	$ 9,771	$ 118,323	$ 36,826
Other comprehensive income/(loss), net of tax:
Changes in unrealized gains on available-for-sale securities	[1],[2]	3,770	11,449	7,547	10,421
Amortization of losses of securities transferred to held-to-maturity from available-for-sale	[1]	385	800	909	1,309
Changes in unrealized gains/(losses) on cash flow hedging instruments	[1],[3]	(518)	(3,427)	515	(8,407)
Foreign currency translation adjustment	[1]	2,240	(5,093)	4,534	(7,279)
Total other comprehensive income/(loss), net of tax	[1]	5,877	3,729	13,505	(3,956)
Comprehensive income		$ 58,688	$ 13,500	$ 131,828	$ 32,870
[1]	Net of tax expense of $3.7 million and $2.3 million for the three months ended June 30, 2017 and 2016, respectively. Net of tax expense of $8.5 million and tax benefit of $2.5 million for the six months ended June 30, 2017 and 2016, respectively.
[2]	There were no reclassifications to earnings during the three and six months ended June 30, 2017 and 2016, respectively.
[3]	Amounts are net of reclassifications to earnings of losses of $0.6 million and $1.5 million for the three months ended June 30, 2017 and 2016, respectively. Amounts are net of reclassifications to earnings of losses of $1.5 million and $2.9 million for the six months ended June 30, 2017 and 2016, respectively.

Consolidated Statements Of Com6

Consolidated Statements Of Comprehensive Income (Parenthetical) (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement Of Income And Comprehensive Income [Abstract]
Changes in unrealized gains (losses) on available-for-sale securities, tax	$ 3.7	$ 2.3	$ 8.5	$ (2.5)
Reclassifications to earnings of realized gains on available-for-sale securities	0	0	0	0
Reclassifications to earnings of losses on cash flow hedging instruments	$ 0.6	$ 1.5	$ 1.5	$ 2.9

Consolidated Statements Of Cash

Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash Flows From Operating Activities:
Net income	$ 118,323	$ 36,826
Adjustments to reconcile net income to net cash provided by/(used in) operating activities:
Depreciation and amortization	16,649	21,604
Amortization of loans and advances to financial advisors and other employees	46,358	33,079
Amortization of premium on investment portfolio	5,964	4,655
Provision for loan losses and allowance for loans and advances to financial advisors and other employees	10,795	6,579
Amortization of intangible assets	6,246	8,008
Deferred income taxes	87,873	54,651
Tax deficit from stock-based compensation		5,197
Stock-based compensation	55,266	94,349
(Gains)/losses on sale of investments	(1,855)	3,911
Gain on extinguishment of Stifel Financial Capital Trust		(5,607)
Other, net	2,111	864
Decrease/(increase) in operating assets, net of assets acquired:
Cash segregated for regulatory purposes and restricted cash	73,085	167,593
Receivables:
Brokerage clients	51,312	133,799
Brokers, dealers, and clearing organizations	666,801	12,396
Securities purchased under agreements to resell	(229,503)	(133,343)
Financial instruments owned, including those pledged	(137,353)	(337,032)
Loans originated as held for sale	(749,265)	(1,093,740)
Proceeds from mortgages held for sale	821,115	1,041,457
Loans and advances to financial advisors and other employees	(33,105)	(47,760)
Other assets	(118,209)	(149,190)
Increase/(decrease) in operating liabilities, net of liabilities assumed:
Brokerage clients	(20,657)	(36,181)
Brokers, dealers, and clearing organizations	34,572	4,439
Drafts	(34,513)	(115,039)
Financial instruments sold, but not yet purchased	6,545	93,941
Other liabilities and accrued expenses	(67,666)	(237,486)
Net cash provided by/(used in) operating activities	610,889	(432,030)
Cash Flows From Investing Activities:
Maturities and principal paydowns of available-for-sale securities	720,828	104,660
Calls and principal paydowns of held-to-maturity securities	132,018	93,686
Sale or maturity of investments	8,642	26,150
Increase in bank loans, net	(571,149)	(1,032,497)
Payments for:
Purchase of available-for-sale securities	(986,027)	(927,687)
Purchase of held-to-maturity securities	(403,250)	(359,337)
Purchase of investments	(1,556)	(5,242)
Purchase of fixed assets	(16,770)	(14,159)
Acquisitions, net of cash received	(9,070)	(71,924)
Net cash used in investing activities	(1,126,334)	(2,186,350)
Cash Flows From Financing Activities:
Proceeds from/(repayments of) borrowings, net	(272,000)	246,073
Proceeds from Federal Home Loan Bank advances, net	290,000	717,000
Payment of contingent consideration	(11,707)
(Decrease)/increase in securities sold under agreements to repurchase	(24,547)	38,328
Increase in bank deposits, net	522,991	1,242,863
Increase/(decrease) in securities loaned	(124,336)	44,008
Tax deficit from stock-based compensation		(5,197)
Restricted stock conversions	(86,682)	(38,081)
Proceeds from stock option exercises		175
Repurchase of common stock	(12,998)	(95,116)
Cash dividends on preferred stock	(4,688)
Extinguishment of Stifel Financial Capital Trust		(9,393)
Net cash provided by financing activities	276,033	2,140,660
Effect of exchange rate changes on cash	4,534	(7,279)
Decrease in cash and cash equivalents	(234,878)	(484,999)
Cash and cash equivalents at beginning of period	912,932	811,019
Cash and cash equivalents at end of period	678,054	326,020
Supplemental disclosure of cash flow information:
Cash paid for income taxes, net of refunds	17,811	21,211
Cash paid for interest	32,287	30,256
Noncash financing activities:
Unit grants, net of forfeitures	48,630	131,736
Issuance of common stock for acquisitions	$ 9,352	$ 11,427

Nature Of Operations And Basis

Nature Of Operations And Basis Of Presentation	6 Months Ended
	Jun. 30, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature Of Operations And Basis Of Presentation	NOTE 1 – Nature of Operations and Basis of Presentation 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 3, 2017, the Company completed the acquisition of City Financial Corporation and its wholly owned subsidiary, City Securities Corporation (“City Securities”), an independent investment bank focused primarily on offering wealth management and public finance services across the Midwest. The acquisition was funded with cash from operations and common stock. 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 Bank & Trust (“Stifel Bank”). All material intercompany balances and transactions have been eliminated. 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, 2016 on file with the SEC. Certain amounts from prior periods have been reclassified to conform to the current period’s presentation. During the first quarter of 2017, we adopted Accounting Standards Update (“ASU”) 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. Amounts previously reported for the three and six months ended June 30, 2016 have been restated as required upon adoption of the ASU. See Note 2 for further discussion. There have been no material changes in our significant accounting policies, as compared to the significant accounting policies described in our Annual Report on Form 10-K for the year ended December 31, 2016, with the exception of the new guidance on stock-based compensation.

Recently Issued Accounting Guid

Recently Issued Accounting Guidance	6 Months Ended
	Jun. 30, 2017
Prospective Adoption Of New Accounting Pronouncements [Abstract]
New Accounting Pronouncements	NOTE 2 – New Accounting Pronouncements Recently Adopted Accounting Guidance Share-Based Payments In March 2016, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-09, “Improvements to Employee Share-Based Payment Accounting” that requires an entity to record all excess tax benefits and tax deficiencies as an income tax benefit or expense in the income statement. The update no longer requires cash flows related to excess tax benefits to be presented as a financing activity separate from other income tax cash flows. The update also clarifies that all cash payments to taxing authorities made on an employee's behalf for withheld shares should be presented as a financing activity on the statement of cash flows and requires an entity to elect an accounting policy to either estimate the number of forfeitures or account for forfeitures when they occur. The guidance is effective for fiscal years beginning after December 15, 2016 (January 1, 2017 for our company). We adopted the guidance in the update on January 1, 2017, and during the six months ended June 30, 2017 recognized an excess tax benefit from stock-based compensation of $17.1 million in the provision for income taxes on the accompanying consolidated statements of operations (adopted prospectively). Excess tax benefits from stock based compensation are now classified in operating activities on the accompanying consolidated statement of cash flows instead of being separately stated in financing activities for the six months ended June 30, 2017 (adopted prospectively). Cash paid to a tax authority by our company when withholding shares from an employee’s award for tax-withholding purposes are now classified as a financing activity in the accompanying consolidated statement of cash flows (adopted retrospectively). We reclassified $38.1 million from operating activities to financing activities in the accompanying consolidated statement of cash flows for the six months ended June 30, 2016 pertaining to shares withheld from employee awards for tax withholding purposes. Following the adoption of ASU 2016-09, we will continue to estimate forfeitures. Goodwill Impairment Testing In January 2017, the FASB issued ASU No. 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 new guidance, 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. In addition, income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit should be considered when measuring the goodwill impairment loss, if applicable. The amendments also eliminate the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The amendments are to be applied on a prospective basis. The guidance is effective for annual or any interim impairment tests in fiscal years beginning after December 15, 2019 (January 1, 2020 for our company). Early adoption is permitted. We are currently evaluating the effect that the new guidance will have on our consolidated financial statements. Statement of Cash Flow – Restricted Cash In November 2016, the FASB issued ASU 2016-18, "Statement of Cash Flow - Restricted Cash," which adds or clarifies guidance on the classification and presentation of restricted cash in the statement of cash flows. The ASU is effective for the fiscal year beginning after December 15, 2017 (January 1, 2018 for our Company). Early adoption is permitted. We are currently evaluating the effect that the new guidance will have on our consolidated financial statements. Financial Instruments – Credit Losses In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” For trade receivables, loans, and held-to-maturity debt securities, the current probable loss recognition methodology is being replaced by an expected credit loss model. For available-for-sale debt securities, the recognition model on credit losses is generally unchanged, except the losses will be presented as an adjustable allowance. The guidance is effective for fiscal years beginning after December 15, 2019 (January 1, 2020 for our Company), including interim periods within that reporting period. Early adoption is permitted for annual periods beginning after December 15, 2018. We have been closely monitoring FASB activity related to the new standard. During the second half of 2016, we began developing a plan regarding the evaluation of the potential changes from adopting the new standard on our future financial reporting and disclosures. We expect to adopt the requirements of the new standard in the first quarter of 2020. Leases In February 2016, the FASB issued ASU No. 2016-02, “Leases” that requires lessees to recognize a right-of-use asset and a lease liability on the balance sheet for all leases with the exception of short-term leases. For lessees, leases will continue to be classified as either operating or finance leases in the income statement. Lessor accounting is similar to the current model but updated to align with certain changes to the lessee model. Lessors will continue to classify leases as operating, direct financing or sales-type leases. The new standard must be adopted using a modified retrospective transition and requires application of the new guidance at the beginning of the earliest comparative period presented. The guidance is effective for fiscal years beginning after December 15, 2018 (January 1, 2019 for our company). Early adoption is permitted. We have been closely monitoring FASB activity related to the new standard. During the second half of 2016, we began developing a plan regarding the evaluation of the potential changes from adopting the new standard on our future financial reporting and disclosures. We also made progress on our contract reviews and detailed policy drafting. Based on our evaluation, we expect to adopt the requirements of the new standard in the first quarter of 2019 and anticipate using the modified retrospective approach. Financial Assets and Financial Liabilities In January 2016, the FASB issued ASU No. 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities” that will change the income statement impact of equity investments held by an entity, and the recognition of changes in fair value of financial liabilities when the fair value option is elected. The guidance is effective for fiscal years beginning after December 15, 2017 (January 1, 2018 for our company). We are currently evaluating the effect that the new guidance will have on our consolidated financial statements. Revenue Recognition In April 2016, the FASB issued ASU No. 2016-10, “Identifying Performance Obligations and Licensing” that amends the revenue guidance in ASU 2014-09 on identifying performance obligations. The effective date of the new guidance will coincide with ASU 2014-09 during the first quarter 2018. In March 2016, the FASB issued ASU No. 2016-08, “Principal versus Agent Considerations (Reporting Revenue Gross versus Net)” (“ASU 2016-08”) that amends the principal versus agent guidance in ASU 2014-09. ASU 2016-08 clarifies that the analysis must focus on whether the entity has control of the goods or services before they are transferred to the customer. ASU 2016-08 also provides additional guidance about how to apply the control principle when services are provided and when goods or services are combined with other goods or services. The effective date of the standard for the Company will coincide with ASU 2014-09 during the first quarter 2018. In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)," ("ASU 2014-09") that supersedes current revenue recognition guidance, including most industry-specific guidance. ASU 2014-09 requires a company to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods and services. The guidance also requires additional disclosures regarding the nature, amount, timing and uncertainty of revenue that is recognized. The FASB has approved a one year deferral of this standard, and this pronouncement is now effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period and is to be applied using one of two retrospective application methods, with early application not permitted. We have been closely monitoring FASB activity related to the new standard. Our implementation efforts include the identification of revenue within the scope of the guidance, and the potential impact on its consolidated results of operations and disclosures. The current broker dealer industry treatment of netting deal expenses with investment banking revenues, the timing of performance fee recognition related to consolidated alternative asset management entities, and fees received for equity research may be impacted by the new guidance. We are also evaluating whether certain asset management contract costs can be capitalized on the consolidated statements of financial position. We expect to adopt the requirements of the new standard in the first quarter of 2018 and anticipate using the modified retrospective approach.

Receivables From And Payables T

Receivables From And Payables To Brokers, Dealers And Clearing Organizations	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and December 31, 2016, included (in thousands) June 30, 2017 December 31, 2016 Receivables from clearing organizations $ 153,241 $ 568,373 Deposits paid for securities borrowed 145,285 382,691 Securities failed to deliver 60,234 73,688 $ 358,760 $ 1,024,752 Amounts payable to brokers, dealers, and clearing organizations at June 30, 2017 and December 31, 2016, included (in thousands) June 30, 2017 December 31, 2016 Deposits received from securities loaned $ 352,127 $ 478,814 Securities failed to receive 50,315 27,882 Payable to clearing organizations 30,901 16,411 $ 433,343 $ 523,107 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	6 Months Ended
	Jun. 30, 2017
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, corporate fixed income 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 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. ARS for which recent market trades were observed that provided transparency into their valuation were classified as Level 2 at June 30, 2017. Direct investments in private companies, reported as Level 3 assets, 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 private company investments, 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): June 30, 2017 Fair value of investments Unfunded commitments Partnership interests $ 5,806 $ 1,348 Mutual funds 12,441 — Private equity funds 8,673 1,856 Money market funds 16,365 — Total $ 43,285 $ 3,204 December 31, 2016 Fair value of investments Unfunded commitments Private company investments $ 18,763 $ 8,526 Partnership interests 15,798 1,822 Mutual funds 11,301 — Private equity funds 9,310 2,020 Money market funds 35,637 — Total $ 90,809 $ 12,368 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, corporate fixed income securities, and equity 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, mortgage-backed securities not actively traded, corporate fixed income securities, and state and municipal securities. Derivatives Derivatives are valued using quoted market prices for identical instruments when available or pricing models based on the net present value of estimated future cash flows. The valuation models used require market observable inputs, including contractual terms, market prices, yield curves, credit curves, and measures of volatility. We manage credit risk for our derivative positions on a counterparty-by-counterparty basis and calculate credit valuation adjustments, included in the fair value of these instruments, on the basis of our relationships at the counterparty portfolio/master netting agreement level. These credit valuation adjustments are determined by applying a credit spread for the counterparty to the total expected exposure of the derivative after considering collateral and other master netting arrangements. We have classified our interest rate swaps as Level 2. Assets and liabilities measured at fair value on a recurring basis as of June 30, 2017, are presented below (in thousands) June 30, 2017 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 16,924 $ 16,924 $ — $ — U.S. government agency securities 119,703 — 119,703 — Mortgage-backed securities: Agency 313,463 — 313,463 — Non-agency 54,566 — 54,041 525 Corporate securities: Fixed income securities 367,866 7,443 360,167 256 Equity securities 43,671 43,304 — 367 State and municipal securities 147,458 — 147,458 — Total financial instruments owned 1,063,651 67,671 994,832 1,148 Available-for-sale securities: U.S. government agency securities 4,565 199 4,366 — State and municipal securities 72,382 — 72,382 — Mortgage-backed securities: Agency 319,062 — 319,062 — Commercial 72,688 — 72,688 — Non-agency 1,617 — 1,617 — Corporate fixed income securities 971,131 — 971,131 — Asset-backed securities 2,013,928 — 2,013,928 — Total available-for-sale securities 3,455,373 199 3,455,174 — Investments: Corporate equity securities 50,384 50,144 — 240 Auction rate securities: Equity securities 48,577 — 13,956 34,621 Municipal securities 841 — — 841 Other 1,610 — 370 1,240 Investments in funds measured at NAV 26,920 Total investments 128,332 50,144 14,326 36,942 Cash equivalents measured at NAV 16,365 Derivative contracts (1) 8,442 $ 8,442 $ 4,672,163 $ 118,014 $ 4,472,774 $ 38,090 (1) June 30, 2017 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 298,832 $ 298,832 $ — $ — U.S. government agency securities 1,995 — 1,995 — Mortgage-backed securities Agency 118,458 — 118,458 — Non-agency 16 — 16 — Corporate securities: Fixed income securities 245,148 317 244,831 — Equity securities 41,091 41,091 — — State and municipal securities 37 — 37 — Total financial instruments sold, but not yet purchased 705,577 340,240 365,337 — Derivative contracts (2) 939 939 $ 706,516 $ 340,240 $ 366,276 $ — (2) Included in accounts payable and accrued expenses in the consolidated statements of financial condition. Assets and liabilities measured at fair value on a recurring basis as of December 31, 2016, are presented below (in thousands) December 31, 2016 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 9,951 $ 9,951 $ — $ — U.S. government agency securities 89,833 — 89,833 — Mortgage-backed securities: Agency 305,774 — 305,774 — Non-agency 28,402 — 27,320 1,082 Corporate securities: Fixed income securities 299,946 1,944 297,729 273 Equity securities 32,044 31,444 — 600 State and municipal securities 159,095 — 159,095 — Total financial instruments owned 925,045 43,339 879,751 1,955 Available-for-sale securities: U.S. government agency securities 4,197 300 3,897 — State and municipal securities 72,490 — 72,490 — Mortgage-backed securities: Agency 338,732 — 338,732 — Commercial 72,773 — 72,773 — Non-agency 1,892 — 1,892 — Corporate fixed income securities 823,511 — 823,511 — Asset-backed securities 1,867,718 — 1,867,718 — Total available-for-sale securities 3,181,313 300 3,181,013 — Investments: Corporate equity securities 27,247 23,414 — 3,833 Auction rate securities: Equity securities 48,689 — — 48,689 Municipal securities 832 — — 832 Other 1,623 — 383 1,240 Investments measured at NAV 55,172 Total investments 133,563 23,414 383 54,594 Cash equivalents measured at NAV 35,637 Derivative contracts (1) 10,390 — 10,390 — $ 4,285,948 $ 67,053 $ 4,071,537 $ 56,549 (1) December 31, 2016 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 362,536 $ 362,536 $ — $ — U.S. government agency securities 20,549 — 20,549 — Mortgage-backed securities Agency 94,552 — 94,552 — Non-agency 1 — 1 — Corporate securities: Fixed income securities 202,968 980 201,988 — Equity securities 18,395 18,395 — — State and municipal securities 31 — 31 — Total financial instruments sold, but not yet purchased 699,032 381,911 317,121 — Derivative contracts (2) 1,823 — 1,823 — $ 700,855 $ 381,911 $ 318,944 $ — (2) Included in accounts payable and accrued expenses in the consolidated statements of financial condition. The following table summarizes the changes in fair value associated with Level 3 financial instruments during the three months ended June 30, 2017 (in thousands) Three Months Ended June 30, 2017 Financial instruments owned Investments Mortgage- Backed Securities – Non-Agency Fixed Income Securities Equity Securities Corporate Equity Securities Auction Securities – Equity Auction Rate Securities – Municipal Other Balance at March 31, 2017 $ 1,019 $ 267 $ 583 $ 3,833 $ 49,055 $ 837 $ 1,240 Unrealized gains/(losses): Included in changes in net assets (1) (100 ) — (216 ) — 251 4 — Included in OCI (2) — — — — — — — Realized gains/(losses) (1) 96 — — — — — — Purchases — — — — — — — Sales (324 ) — — — — — — Redemptions (166 ) (11 ) — — — — — Transfers: Into Level 3 — — — — — — — Out of Level 3 — — — (3,593 ) (14,685 ) — — Net change (494 ) (11 ) (216 ) (3,593 ) (14,434 ) 4 — Balance at June 30, 2017 $ 525 $ 256 $ 367 $ 240 $ 34,621 $ 841 $ 1,240 (1) Realized and unrealized gains/(losses) related to financial instruments owned and investments are reported in other income in the consolidated statements of operations. (2) Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss in the consolidated statements of financial condition. The following table summarizes the change in fair value associated with Level 3 financial instruments during the six months ended June 30, 2017 (in thousands): Six Months Ended June 30, 2017 Financial instruments owned Investments Mortgage- Backed Securities – Non-Agency Fixed Income Securities Equity Securities Corporate Equity Securities Auction Securities – Equity Auction Rate Securities – Municipal Other Balance at December 31, 2016 $ 1,082 $ 273 $ 600 $ 3,833 $ 48,689 $ 832 $ 1,240 Unrealized gains/(losses): Included in changes in net assets (1) (100 ) — (233 ) — 617 9 — Included in OCI (2) — — — — — — — Realized gains/(losses) (1) 97 — — — — — — Purchases — — — — — — — Sales (324 ) — — — — — — Redemptions (230 ) (17 ) — — — — — Transfers: Into Level 3 — — — — — — — Out of Level 3 — — — (3,593 ) (14,685 ) — — Net change (557 ) (17 ) (233 ) (3,593 ) (14,068 ) 9 — Balance at June 30, 2017 $ 525 $ 256 $ 367 $ 240 $ 34,621 $ 841 $ 1,240 (1) Realized and unrealized gains/(losses) related to financial instruments owned and investments are reported in other income in the consolidated statements of operations. (2) Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss in the consolidated statements of financial. The results included in the tables above are only a component of the overall investment strategies of our company. The tables above do not present Level 1 or Level 2 valued assets or liabilities. The changes to our company’s Level 3 classified instruments during the six months ended June 30, 2017 were principally a result of transfers out of Level 3 due to market activity that provided transparency into the valuation of these assets. The changes in unrealized gains/(losses) recorded in earnings for the three and six months ended June 30, 2017, relating to Level 3 assets still held at June 30, 2017, 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 June 30, 2017. Valuation technique Unobservable input Range Weighted average Investments: Auction rate securities: Equity securities Discounted cash flow Discount rate 1.2% - 10.5% 5.2% Workout period 1 - 3 years 2.2 years Municipal securities Discounted cash flow Discount rate 1.6% - 9.4% 3.9% Workout period 1 - 4 years 1.9 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. Transfers Within the Fair Value Hierarchy We assess our financial instruments on a quarterly basis to determine the appropriate classification within the fair value hierarchy. Transfers between fair value classifications occur when there are changes in pricing observability levels. Transfers of financial instruments among the levels are deemed to occur at the beginning of the reporting period. There were $1.0 million and $1.1 million of transfers of financial assets from Level 2 to Level 1 during the three and six months ended June 30, 2017, respectively, primarily related to corporate fixed income securities for which market trades were observed that provided transparency into the valuation of these assets. There were $4.0 million and $4.4 million of transfers of financial assets from Level 1 to Level 2 during the three and six months ended June 30, 2017, respectively, primarily related to corporate fixed income securities for which there were low volumes of recent trade activity observed. There were no transfers into Level 3 during the six months ended June 30, 2017. There were $18.3 million of transfers of financial assets out of Level 3 during the three and six months ended June 30, 2017, primarily related to ARS and corporate equity securities for which market trades were observed that provided transparency into the valuation of these assets. Fair Value of Financial Instruments The following reflects the fair value of financial instruments as of June 30, 2017 and December 31, 2016, whether or not recognized in the consolidated statements of financial condition at fair value (in thousands) June 30, 2017 December 31, 2016 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Cash and cash equivalents $ 678,054 $ 678,054 $ 912,932 $ 912,932 Cash segregated for regulatory purposes 150 150 73,235 73,235 Securities purchased under agreements to resell 478,091 478,091 248,588 248,588 Financial instruments owned 1,063,651 1,063,651 925,045 925,045 Available-for-sale securities 3,455,373 3,455,373 3,181,313 3,181,313 Held-to-maturity securities 3,307,970 3,321,880 3,038,405 3,040,554 Loans held for sale 139,676 139,676 228,588 228,588 Bank loans 6,160,093 5,994,527 5,591,190 5,633,804 Investments 128,332 128,332 133,563 133,563 Derivative contracts (1) 8,442 8,442 10,390 10,390 Financial liabilities: Securities sold under agreements to repurchase $ 243,999 $ 243,999 $ 268,546 $ 268,546 Bank deposits 12,050,474 11,366,970 11,527,483 11,092,185 Financial instruments sold, but not yet purchased 705,577 705,577 699,032 699,032 Derivative contracts (2) 939 939 1,823 1,823 Federal Home Loan Bank advances 790,000 790,000 500,000 500,000 Borrowings 105,000 105,000 377,000 377,000 Senior notes 796,296 811,318 795,891 799,632 Debentures to Stifel Financial Capital Trusts 67,500 50,413 67,500 52,525 (1) (2) Included in accounts payable and accrued expenses in the consolidated statements of financial condition. The following table presents the estimated fair values of financial instruments not measured at fair value on a recurring basis as of June 30, 2017 and December 31, 2016 (in thousands) June 30, 2017 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 661,689 $ 661,689 $ — $ — Cash segregated for regulatory purposes 150 150 — — Securities purchased under agreements to resell 478,091 478,091 — — Held-to-maturity securities 3,321,880 — 3,119,542 202,338 Loans held for sale 139,676 — 139,676 — Bank loans 5,994,527 — 5,994,527 — Financial liabilities: Securities sold under agreements to repurchase $ 243,999 $ — $ 243,999 $ — Bank deposits 11,366,970 — 11,366,970 — Federal Home Loan Bank advances 790,000 790,000 — — Borrowings 105,000 105,000 — — Senior notes 811,318 811,318 — — Debentures to Stifel Financial Capital Trusts 50,413 — — 50,413 December 31, 2016 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 877,295 $ 877,295 $ — $ — Cash segregated for regulatory purposes 73,235 73,235 — — Securities purchased under agreements to resell 248,588 227,983 20,605 — Held-to-maturity securities 3,040,554 — 2,830,869 209,685 Loans held for sale 228,588 — 228,588 — Bank loans 5,633,804 — 5,633,804 — Financial liabilities: Securities sold under agreements to repurchase $ 268,546 $ 149,881 $ 118,665 $ — Bank deposits 11,092,185 — 11,092,185 — Federal Home Loan Bank advances 500,000 500,000 — — Borrowings 377,000 377,000 — — Senior notes 799,632 799,632 — — Debentures to Stifel Financial Capital Trusts 52,525 — — 52,525 The following, as supplemented by the discussion above, describes the valuation techniques used in estimating the fair value of our financial instruments as of June 30, 2017 and December 31, 2016. 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 June 30, 2017 and December 31, 2016 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 June 30, 2017 and December 31, 2016 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 Bank’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 the coupon achieved in our 4.250% senior notes due 2024. 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	6 Months Ended
	Jun. 30, 2017
Trading Securities Balance Sheet Reported Amounts [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 June 30, 2017 and December 31, 2016 are as follows (in thousands) June 30, 2017 December 31, 2016 Financial instruments owned: U.S. government securities $ 16,924 $ 9,951 U.S. government agency securities 119,703 89,833 Mortgage-backed securities: Agency 313,463 305,774 Non-agency 54,566 28,402 Corporate securities: Fixed income securities 367,866 299,946 Equity securities 43,671 32,044 State and municipal securities 147,458 159,095 $ 1,063,651 $ 925,045 Financial instruments sold, but not yet purchased: U.S. government securities $ 298,832 $ 362,536 U.S. government agency securities 1,995 20,549 Mortgage-backed securities: Agency 118,458 94,552 Non-agency 16 1 Corporate securities: Fixed income securities 245,148 202,968 Equity securities 41,091 18,395 State and municipal securities 37 31 $ 705,577 $ 699,032 At June 30, 2017 and December 31, 2016, financial instruments owned in the amount of $591.6 million and $992.9 million, respectively, were pledged as collateral for our repurchase agreements and short-term borrowings. Financial instruments owned on a settlement-date basis were $1.3 billion at December 31, 2016. 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	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and December 31, 2016 (in thousands) June 30, 2017 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 4,584 $ — $ (19 ) $ 4,565 State and municipal securities 75,685 2 (3,305 ) 72,382 Mortgage-backed securities: Agency 321,352 131 (2,421 ) 319,062 Commercial 76,131 42 (3,485 ) 72,688 Non-agency 1,721 — (104 ) 1,617 Corporate fixed income securities 971,867 2,843 (3,579 ) 971,131 Asset-backed securities 2,000,561 13,367 — 2,013,928 $ 3,451,901 $ 16,385 $ (12,913 ) $ 3,455,373 Held-to-maturity securities (2) Mortgage-backed securities: Agency $ 1,454,314 $ 16,885 $ (14,474 ) $ 1,456,725 Commercial 59,518 2,088 — 61,606 Asset-backed securities 1,754,093 11,405 (2,063 ) 1,763,435 Corporate fixed income securities 40,045 69 — 40,114 $ 3,307,970 $ 30,447 $ (16,537 ) $ 3,321,880 December 31, 2016 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 4,213 $ 2 $ (18 ) $ 4,197 State and municipal securities 76,066 — (3,576 ) 72,490 Mortgage-backed securities: Agency 340,738 298 (2,304 ) 338,732 Commercial 77,417 59 (4,703 ) 72,773 Non-agency 2,032 — (140 ) 1,892 Corporate fixed income securities 830,695 1,418 (8,602 ) 823,511 Asset-backed securities 1,858,929 9,857 (1,068 ) 1,867,718 $ 3,190,090 $ 11,634 $ (20,411 ) $ 3,181,313 Held-to-maturity securities (2) Mortgage-backed securities: Agency $ 1,567,758 $ 14,537 $ (17,037 ) $ 1,565,258 Commercial 59,581 1,786 — 61,367 Non-agency 688 — (13 ) 675 Asset-backed securities 1,370,300 6,242 (3,396 ) 1,373,146 Corporate fixed income securities 40,078 30 — 40,108 $ 3,038,405 $ 22,595 $ (20,446 ) $ 3,040,554 (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. For the three and six months ended June 30, 2017, we received proceeds of $87.3 million from the sale of available-for-sale securities, which resulted in realized gains of $0.4 million. There were no sales of available-for-sale securities during the three and six months ended June 30, 2016. During the three months ended June 30, 2017 and June 30, 2016, unrealized gains, net of deferred taxes, of $3.8 million and $ 11.4 million were recorded in accumulated other comprehensive loss in the consolidated statements of financial condition. During the six months ended June 30, 2017 and June 30, 2016, unrealized gains, net of deferred taxes, of $7.5 million and $10.4 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 debt 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. June 30, 2017 Available-for-sale securities Held-to-maturity securities Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Debt securities Within one year $ 142,136 $ 142,514 $ 40,045 $ 40,114 After one year through three years 138,597 139,032 — — After three years through five years 432,593 432,306 — — After five years through ten years 702,630 703,979 335,011 335,513 After ten years 1,636,741 1,644,175 1,419,082 1,427,922 Mortgage-backed securities After three years through five years — — 59,518 61,606 After five years through ten years 58,618 55,846 162,429 161,038 After ten years 340,586 337,521 1,291,885 1,295,687 $ 3,451,901 $ 3,455,373 $ 3,307,970 $ 3,321,880 The maturities of our available-for-sale (fair value) and held-to-maturity (amortized cost) securities at June 30, 2017, 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 $ 824 $ 3,741 $ — $ — $ 4,565 State and municipal securities 200 375 16,738 55,069 72,382 Mortgage-backed securities: Agency — — 412 318,650 319,062 Commercial — — 55,434 17,254 72,688 Non-agency — — — 1,617 1,617 Corporate fixed income securities 141,490 567,222 262,419 — 971,131 Asset-backed securities — — 424,822 1,589,106 2,013,928 $ 142,514 $ 571,338 $ 759,825 $ 1,981,696 $ 3,455,373 Held-to-maturity: Mortgage-backed securities: Agency $ — $ — $ 162,429 $ 1,291,885 $ 1,454,314 Commercial — 59,518 — — 59,518 Asset-backed securities — — 335,011 1,419,082 1,754,093 Corporate fixed income securities 40,045 — — — 40,045 $ 40,045 $ 59,518 $ 497,440 $ 2,710,967 $ 3,307,970 (1) Due to the immaterial amount of income recognized on tax-exempt securities, yields were not calculated on a tax-equivalent basis. At June 30, 2017 and December 31, 2016, securities of $1.9 billion and $2.0 billion, respectively, were pledged at the Federal Home Loan Bank as collateral for borrowings and letters of credit obtained to secure public deposits. At June 30, 2017 and December 31, 2016, securities of $1.9 billion and $1.7 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 June 30, 2017 (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 $ (19 ) $ 4,565 $ — $ — $ (19 ) $ 4,565 State and municipal securities (261 ) 9,765 (3,044 ) 60,113 (3,305 ) 69,878 Mortgage-backed securities: Agency (604 ) 155,073 (1,817 ) 133,664 (2,421 ) 288,737 Commercial (3,485 ) 71,139 — — (3,485 ) 71,139 Non-agency — — (104 ) 1,585 (104 ) 1,585 Corporate fixed income securities (3,579 ) 396,324 — — (3,579 ) 396,324 $ (7,948 ) $ 636,866 $ (4,965 ) $ 195,362 $ (12,913 ) $ 832,228 Held-to-maturity securities Mortgage-backed securities: Agency $ (14,457 ) $ 830,887 $ (17 ) $ 1,165 $ (14,474 ) $ 832,052 Asset-backed securities (312 ) 116,997 (1,751 ) 34,391 (2,063 ) 151,388 $ (14,769 ) $ 947,884 $ (1,768 ) $ 35,556 $ (16,537 ) $ 983,440 At June 30, 2017, the amortized cost of 124 securities classified as available for sale exceeded their fair value by $12.9 million, of which $5.0 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 June 30, 2017, was $832.2 million, which was 24.1% of our available-for-sale portfolio. At June 30, 2017, the carrying value of 45 securities held to maturity exceeded their fair value by $16.5 million, of which $1.8 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 and six months ended June 30, 2017 and 2016. We believe the gross unrealized losses of $29.5 million related to our investment portfolio, as of June 30, 2017, 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	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Bank Loans	NOTE 7 – Bank Loans Our loan portfolio consists primarily of the following segments: Real Estate. Real estate loans include commercial real estate, residential real estate non-conforming loans, residential real estate conforming loans 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. 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. 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. Consumer. Consumer loans allow customers to purchase non-investment goods and services. Construction and land. Short-term loans used to finance the development of a real estate project. The following table presents the balance and associated percentage of each major loan category in our bank loan portfolio at June 30, 2017 and December 31, 2016 (in thousands, except percentages) June 30, 2017 December 31, 2016 Balance Percent Balance Percent Residential real estate $ 2,248,528 36.2 % $ 2,161,400 38.4 % Commercial and industrial 2,064,052 33.2 1,710,399 30.3 Securities-based loans 1,755,592 28.3 1,614,033 28.6 Commercial real estate 71,517 1.2 78,711 1.4 Consumer 42,666 0.7 45,391 0.8 Home equity lines of credit 14,303 0.2 15,008 0.3 Construction and land 17,155 0.2 12,623 0.2 Gross bank loans 6,213,813 100.0 % 5,637,565 100.0 % Unamortized loan premium/(discount), net 1,113 858 Unamortized loan fees, net of loan fees 75 (49 ) Loans in process (706 ) (2,021 ) Allowance for loan losses (54,202 ) (45,163 ) Bank loans, net $ 6,160,093 $ 5,591,190 At June 30, 2017 and December 31, 2016, Stifel Bank had loans outstanding to its executive officers, directors, and their affiliates in the amount of $3.9 million and $3.7 million, respectively, and loans outstanding to other Stifel Financial Corp. executive officers, directors, and their affiliates in the amount of $7.0 million and $5.6 million, respectively. At June 30, 2017 and December 31, 2016, we had loans held for sale of $139.7 million and $228.6 million, respectively. For the three months ended June 30, 2017 and 2016, we recognized gains of $3.4 million and $4.1 million, respectively, from the sale of originated loans, net of fees and costs. For the six months ended June 30, 2017 and 2016, we recognized gains of $6.2 million and $6.9 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 and six months ended June 30, 2017 (in thousands) Three Months Ended June 30, 2017 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 38,789 $ 2,266 $ (250 ) $ — $ 40,805 Securities-based loans 3,393 207 — — 3,600 Consumer 107 (2 ) — — 105 Residential real estate 4,190 1,379 — — 5,569 Commercial real estate 1,618 2,017 (2,703 ) — 932 Home equity lines of credit 285 (3 ) — 1 283 Construction and land 437 (213 ) — — 224 Qualitative 2,479 205 — — 2,684 $ 51,298 $ 5,856 $ (2,953 ) $ 1 $ 54,202 Six Months Ended June 30, 2017 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 35,127 $ 5,928 $ (250 ) $ — $ 40,805 Securities-based loans 3,094 506 — — 3,600 Consumer 129 (24 ) — — 105 Residential real estate 2,660 2,909 — — 5,569 Commercial real estate 1,363 2,272 (2,703 ) — 932 Home equity lines of credit 371 (89 ) — 1 283 Construction and land 232 (8 ) — — 224 Qualitative 2,187 497 — — 2,684 $ 45,163 $ 11,991 $ (2,953 ) $ 1 $ 54,202 The following table presents the recorded balances of loans and amount of allowance allocated based upon impairment method by portfolio segment at June 30, 2017 (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 Residential real estate $ 24 $ 5,545 $ 5,569 $ 174 $ 2,248,354 $ 2,248,528 Commercial and industrial 2,155 38,650 40,805 13,949 2,050,103 2,064,052 Securities-based loans — 3,600 3,600 — 1,755,592 1,755,592 Commercial real estate — 932 932 — 71,517 71,517 Consumer 4 101 105 4 42,662 42,666 Home equity lines of credit 149 134 283 323 13,980 14,303 Construction and land — 224 224 — 17,155 17,155 Qualitative — 2,684 2,684 — — — $ 2,332 $ 51,870 $ 54,202 $ 14,450 $ 6,199,363 $ 6,213,813 The following table details activity in the allowance for loan losses by portfolio segment for the three and six months ended June 30, 2016 (in thousands) Three Months Ended June 30, 2016 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 27,700 $ 2,116 $ — $ — $ 29,816 Securities-based loans 1,605 126 — — 1,731 Consumer 84 23 — — 107 Residential real estate 1,330 210 (13 ) 2 1,529 Commercial real estate 1,289 (780 ) — 3 512 Home equity lines of credit 267 16 — — 283 Construction and land 118 26 — — 144 Qualitative 1,657 87 — — 1,744 $ 34,050 $ 1,824 $ (13 ) $ 5 $ 35,866 Six Months Ended June 30, 2016 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 24,748 $ 5,068 $ — $ — $ 29,816 Securities-based loans 1,607 124 — — 1,731 Consumer 105 2 — — 107 Residential real estate 1,241 298 (13 ) 3 1,529 Commercial real estate 264 241 — 7 512 Home equity lines of credit 290 (7 ) — — 283 Construction and land 78 66 — — 144 Qualitative 1,454 290 — — 1,744 $ 29,787 $ 6,082 $ (13 ) $ 10 $ 35,866 The following table presents the recorded balances of loans and amount of allowance allocated based upon impairment method by portfolio segment at December 31, 2016 (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 Residential real estate $ 24 $ 2,636 $ 2,660 $ 178 $ 2,161,222 $ 2,161,400 Commercial and industrial 2,392 32,735 35,127 16,815 1,693,584 1,710,399 Securities-based loans — 3,094 3,094 — 1,614,033 1,614,033 Commercial real estate 722 641 1,363 9,522 69,189 78,711 Consumer 6 123 129 6 45,385 45,391 Home equity lines of credit 231 140 371 413 14,595 15,008 Construction and land — 232 232 — 12,623 12,623 Qualitative — 2,187 2,187 — — — $ 3,375 $ 41,788 $ 45,163 $ 26,934 $ 5,610,631 $ 5,637,565 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 (“TDR”), which have been specifically identified for impairment analysis by the Company and determined to be impaired. At June 30, 2017, we had $14.4 million of impaired loans, net of discounts, which included $9.2 million in troubled debt restructurings, for which there was a specific allowance of $2.3 million. At December 31, 2016, we had $26.9 million of impaired loans, net of discounts, which included $9.7 million in troubled debt restructurings, for which there was a specific allowance of $3.4 million. The gross interest income related to impaired loans, which would have been recorded, had these loans been current in accordance with their original terms, and the interest income recognized on these loans during the three and six months ended June 30, 2017 and 2016, were insignificant to the consolidated financial statements. The tables below present loans that were individually evaluated for impairment by portfolio segment at June 30, 2017 and December 31, 2016, including the average recorded investment balance (in thousands) June 30, 2017 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 13,949 $ — $ 13,949 $ 13,949 $ 2,155 $ 16,921 Consumer 679 — 4 4 4 7 Residential real estate 174 — 174 174 24 176 Home equity lines of credit 323 — 323 323 149 323 Total $ 15,125 $ — $ 14,450 $ 14,450 $ 2,332 $ 17,427 December 31, 2016 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 16,815 $ — $ 16,815 $ 16,815 $ 2,392 $ 22,559 Commercial real estate 10,503 — 9,522 9,522 722 9,080 Consumer 833 — 6 6 6 9 Home equity lines of credit 413 — 413 413 231 413 Residential real estate 178 — 178 178 24 181 Total $ 28,742 $ — $ 26,934 $ 26,934 $ 3,375 $ 32,242 The following table presents the aging of the recorded investment in past due loans at June 30, 2017 and December 31, 2016 by portfolio segment (in thousands) As of June 30, 2017 30 – 89 Days Past Due 90 or More Days Past Due Total Due Current Balance Total Residential real estate $ 1,035 $ — $ 1,035 $ 2,247,493 $ 2,248,528 Commercial and industrial — — — 2,064,052 2,064,052 Securities-based loans — — — 1,755,592 1,755,592 Commercial real estate — — — 71,517 71,517 Consumer 6 2 8 42,658 42,666 Home equity lines of credit — 184 184 14,119 14,303 Construction and land — — — 17,155 17,155 Total $ 1,041 $ 186 $ 1,227 $ 6,212,586 $ 6,213,813 As of June 30, 2017 * Non-Accrual Restructured (1) Total Commercial and industrial $ 4,951 $ 8,998 $ 13,949 Home equity lines of credit 323 — 323 Residential real estate — 174 174 Consumer 4 — 4 Total $ 5,278 $ 9,172 $ 14,450 (1) On non-accrual status. * There were no loans past due 90 days and still accruing interest at June 30, 2017. As of December 31, 2016 30 – 89 Days Past Due 90 or More Days Past Due Total Past Due Current Balance Total Residential real estate $ 1,923 $ — $ 1,923 $ 2,159,477 $ 2,161,400 Commercial and industrial — — — 1,710,399 1,710,399 Securities-based loans — — — 1,614,033 1,614,033 Commercial real estate 9,522 — 9,522 69,189 78,711 Consumer — 2 2 45,389 45,391 Home equity lines of credit 78 196 274 14,734 15,008 Construction and land — — — 12,623 12,623 Total $ 11,523 $ 198 $ 11,721 $ 5,625,844 $ 5,637,565 As of December 31, 2016* Non-Accrual Restructured Total Commercial and industrial $ 16,815 $ — $ 16,815 Commercial real estate — 9,522 9,522 Home equity lines of credit 413 — 413 Residential real estate — 178 178 Consumer 6 — 6 Total $ 17,234 $ 9,700 $ 26,934 * There were no loans past due 90 days and still accruing interest at December 31, 2016. 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 June 30, 2017 and December 31, 2016, 98.2% and 97.9% 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. Doubtful loans are considered impaired. Substandard loans are regularly reviewed for impairment. 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 June 30, 2017 Pass Special Substandard Doubtful Total Residential real estate $ 2,248,238 $ 116 $ 174 $ — $ 2,248,528 Commercial and industrial 2,035,973 12,635 15,444 — 2,064,052 Securities-based loans 1,755,592 — — — 1,755,592 Commercial real estate 71,517 — — — 71,517 Consumer 42,662 — 4 — 42,666 Home equity lines of credit 13,980 — 323 — 14,303 Construction and land 17,155 — — — 17,155 Total $ 6,185,117 $ 12,751 $ 15,945 $ — $ 6,213,813 As of December 31, 2016 Pass Special Substandard Doubtful Total Residential real estate $ 2,161,223 $ — $ 177 $ — $ 2,161,400 Commercial and industrial 1,652,211 27,905 30,283 — 1,710,399 Securities-based loans 1,614,033 — — — 1,614,033 Commercial real estate 69,189 — 9,522 — 78,711 Consumer 45,385 — 6 — 45,391 Home equity lines of credit 14,595 — 413 — 15,008 Construction and land 12,623 — — — 12,623 Total $ 5,569,259 $ 27,905 $ 40,401 $ — $ 5,637,565

Goodwill And Intangible Assets

Goodwill And Intangible Assets	6 Months Ended
	Jun. 30, 2017
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, 2016 Adjustments Write-off June 30, 2017 Goodwill Global Wealth Management $ 270,779 $ 6,622 $ — $ 277,401 Institutional Group 691,503 860 — 692,363 $ 962,282 $ 7,482 $ — $ 969,764 December 31, 2016 Net Additions Amortization June 30, 2017 Intangible assets Global Wealth Management $ 45,231 $ 3,800 $ (2,273 ) $ 46,758 Institutional Group 71,073 1,395 (3,973 ) 68,495 $ 116,304 $ 5,195 $ (6,246 ) $ 115,253 The adjustments to goodwill and intangible assets during the six months ended June 30, 2017, are primarily attributable to the acquisition of City Securities, which closed on January 3, 2017. The allocation of the purchase price for this acquisition is preliminary and will be finalized upon completion of the analysis of the fair values of the net assets of the acquisitions as of the acquisition date and the identified intangible assets. The final goodwill recorded on the consolidated statement of financial condition may differ from the preliminary estimate reflected herein. Goodwill for certain of our acquisitions is deductible for tax purposes. 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 June 30, 2017 and December 31, 2016 were as follows (in thousands) June 30, 2017 December 31, 2016 Gross Carrying Value Accumulated Amortization Gross Carrying Value Accumulated Amortization Customer relationships $ 146,687 $ 51,267 $ 141,621 $ 46,209 Trade name 24,713 9,464 24,713 8,670 Investment banking backlog 2,608 1,040 1,345 379 Non-compete agreements 1,445 547 2,578 813 $ 175,453 $ 62,318 $ 170,257 $ 56,071 Amortization expense related to intangible assets was $3.2 million and $5.0 million for the three months ended June 30, 2017 and 2016, respectively. Amortization expense related to intangible assets was $6.2 million and $8.0 million for the six months ended June 30, 2017 and 2016, respectively. The weighted-average remaining lives of the following intangible assets at June 30, 2017, are: customer relationships, 11.2 years; trade name, 11.0 years; non-compete agreements, 9.9 years; and backlog within the next 3 months. As of June 30, 2017, we expect amortization expense in future periods to be as follows (in thousands) Fiscal year Remainder of 2017 $ 5,780 2018 10,953 2019 10,348 2020 10,128 2021 9,611 Thereafter 66,315 $ 113,135

Borrowings and Federal Home Loa

Borrowings and Federal Home Loan Bank Advances	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017, totaled $1.0 billion with six 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 $444.4 million during the six months ended June 30, 2017. There are no compensating balance requirements under these arrangements. Any borrowings on secured lines of credit are generally utilized to finance certain fixed income securities. At June 30, 2017, our uncommitted secured lines of credit of $105.0 million were collateralized by company-owned securities valued at $242.2 million. The Federal Home Loan advances as of June 30, 2017 are floating-rate advances. The weighted average interest rates on these advances during the three and six months ended June 30, 2017 was 1.21% and 1.18%, respectively. The advances are secured by Stifel Bank’s residential mortgage loan portfolio and investment portfolio. The interest rates reset on a daily basis. Stifel Bank has the option to prepay these advances without penalty on the interest reset date. Our committed bank line financing at June 30, 2017, consisted of a $200.0 million revolving credit facility. The credit facility expires in March 2020. The applicable interest rate under the revolving credit facility is calculated as a per annum rate equal to the London Interbank Offered Rate (“LIBOR”) plus 2.00%, as defined in the revolving credit facility. At June 30, 2017, we had no advances on our revolving credit facility and were in compliance with all covenants.

Senior Notes

Senior Notes	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Senior Notes	NOTE 10 – Senior Notes The following table summarizes our senior notes as of June 30, 2017 and December 31, 2016 (in thousands) June 30, 2017 December 31, 2016 4.250% senior notes, due 2024 (1) $ 500,000 $ 500,000 3.50% senior notes, due 2020 (2) 300,000 300,000 800,000 800,000 Debt issuance costs, net (3,704 ) (4,109 ) $ 796,296 $ 795,891 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. Our senior notes mature as follows, based upon contractual terms (in thousands) 2017 $ — 2018 — 2019 — 2020 300,000 2021 — Thereafter 500,000 $ 800,000

Bank Deposits

Bank Deposits	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and December 31, 2016 were as follows (in thousands) June 30, 2017 December 31, 2016 Money market and savings accounts $ 11,804,509 $ 11,264,285 Demand deposits (interest-bearing) 235,269 253,545 Demand deposits (non-interest-bearing) 7,851 5,752 Certificates of deposit 2,845 3,901 $ 12,050,474 $ 11,527,483 The weighted-average interest rate on deposits was 0.06% and 0.09% at June 30, 2017 and December 31, 2016, respectively. At June 30, 2017 and December 31, 2016, the amount of deposits includes related party deposits, primarily brokerage customers’ deposits from Stifel of $12.1 billion and $11.5 billion, respectively, and interest-bearing and time deposits of executive officers, directors, and their affiliates of $0.2 million and $0.5 million, respectively.

Derivative Instruments And Hedg

Derivative Instruments And Hedging Activities	6 Months Ended
	Jun. 30, 2017
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 as of June 30, 2017 and December 31, 2016 (in thousands) June 30, 2017 Notional Balance Location Fair Value Asset Derivatives Cash flow interest rate contracts $ 790,000 Other assets $ 8,442 Liability Derivatives Cash flow interest rate contracts $ 100,983 Accounts payable and accrued expenses $ 939 December 31, 2016 Notional Value Balance Location Fair Value Asset Derivatives Cash flow interest rate contracts $ 790,000 Other assets $ 10,390 Liability Derivatives Cash flow interest rate contracts $ 121,442 Accounts payable and accrued expenses $ 1,823 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 2.9 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 on the accompanying consolidated statements of operations. The ineffective portion of the cash flow hedging instruments is recorded in other income or other operating expense. The loss recognized during the three and six months ended June 30, 2017 and 2016, respectively, related to ineffectiveness was insignificant. 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 $0.3 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 and six months ended June 30, 2017 and 2016 (in thousands) Three Months Ended June 30, 2017 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Loss Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Gain/(Loss) Recognized Due to Ineffectiveness Cash flow interest rate contracts $ 3,340 Interest expense $ 622 Interest expense $ — Three Months Ended June 30, 2016 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Loss Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Loss Recognized Due to Ineffectiveness Cash flow interest rate contracts $ (7,099 ) Interest $ 1,537 None $ 33 Six Months Ended June 30, 2017 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Loss Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Loss Recognized Due to Ineffectiveness Cash flow interest rate contracts $ 2,576 Interest $ 1,534 None $ — Six Months Ended June 30, 2016 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Loss Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Loss Recognized Due to Ineffectiveness Cash flow interest rate contracts $ (16,525 ) Interest expense $ 2,882 None $ 46 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. As of June 30, 2017, the fair value of derivatives in a net liability position, which includes accrued interest but excludes any adjustment for nonperformance risk, related to these agreements was $0.9 million (termination value). We have minimum collateral posting thresholds with certain of our derivative counterparties and have posted cash collateral of $9.8 million against our obligations under these agreements. If we had breached any of these provisions at June 30, 2017, we would have been required to settle our obligations under the agreements at the termination value. 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	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and December 31, 2016 (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 June 30, 2017: Securities borrowing (1) $ 145,285 $ — $ 145,285 $ (99,074 ) $ (34,768 ) $ 11,443 Reverse repurchase agreements (2) 478,091 — 478,091 (205,017 ) (273,074 ) — Cash flow interest rate contracts 8,442 — 8,442 — — 8,442 $ 631,818 $ — $ 631,818 $ (304,091 ) $ (307,842 ) $ 19,885 As of December 31, 2016: Securities borrowing (1) $ 382,691 $ — $ 382,691 $ (291,793 ) $ (68,776 ) $ 22,122 Reverse repurchase agreements (2) 248,588 — 248,588 (216,542 ) (32,046 ) — Cash flow interest rate contracts 10,390 — 10,390 — — 10,390 $ 641,669 $ — $ 641,669 $ (508,335 ) $ (100,822 ) $ 32,512 (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 $474.1 million and $248.5 million at June 30, 2017 and December 31, 2016, respectively. The following table provides information about financial liabilities and derivative liabilities that are subject to offset as of June 30, 2017 and December 31, 2016 (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 June 30, 2017: Securities lending (3) $ (352,127 ) $ — $ (352,127 ) $ 99,074 $ 234,970 $ (18,083 ) Repurchase agreements (4) (243,999 ) — (243,999 ) 205,017 38,982 — Cash flow interest rate contracts (939 ) — (939 ) — 939 — $ (597,065 ) $ — $ (597,065 ) $ 304,091 $ 274,891 $ (18,083 ) As of December 31, 2016: Securities lending (3) $ (478,814 ) $ — $ (478,814 ) $ 291,793 $ 175,849 $ (11,172 ) Repurchase agreements (4) (268,546 ) — (268,546 ) 216,542 52,004 — Cash flow interest rate contracts (1,823 ) — (1,823 ) — 1,823 — $ (749,183 ) $ — $ (749,183 ) $ 508,335 $ 229,676 $ (11,172 ) (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 counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $263.8 million and $299.3 million at June 30, 2017 and December 31, 2016, respectively.

Commitments, Guarantees, And Co

Commitments, Guarantees, And Contingencies	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017, 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 Bank has commitments to extend credit in the form of commitments to originate loans, standby letters of credit, and lines of credit. See Note 19 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 June 30, 2017 and December 31, 2016, 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	6 Months Ended
	Jun. 30, 2017
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 the allegations in these claims, and we believe that there are meritorious defenses in each of these lawsuits, arbitrations, and regulatory investigations. In view of the number and diversity of claims against our company, the number of jurisdictions in which litigation is pending, and the inherent difficulty of predicting the outcome of litigation and other claims, we cannot state with certainty what the eventual outcome of pending litigation or other claims will be. We have established reserves for potential losses that are probable and reasonably estimable that may result from pending and potential legal actions, investigations, and regulatory proceedings. In many cases, however, it is inherently difficult to determine whether any loss is probable or reasonably possible or to estimate the amount or range of any potential loss, particularly where proceedings may be in relatively early stages or where plaintiffs are seeking substantial or indeterminate damages. Matters frequently need to be more developed before a loss or range of loss can reasonably be estimated. In our opinion, based on currently available information, review with outside legal counsel, and consideration of amounts provided for in our consolidated financial statements with respect to these matters, including the matters described below, the ultimate resolution of these matters will not have a material adverse impact on our financial position and results of operations. However, resolution of one or more of these matters may have a material effect on the results of operations in any future period, depending upon the ultimate resolution of those matters and depending upon the level of income for such period. For matters where a reserve has not been established and for which we believe a loss is reasonably possible, as well as for matters where a reserve has been recorded but for which an exposure to loss in excess of the amount accrued is reasonably possible, based on currently available information, we believe that such losses will not have a material effect on our consolidated financial statements. Broyles, et al. v. Cantor Fitzgerald & Co. et al. Matter In December 2013, Stone & Youngberg, LLC (“Stone & Youngberg”) was named in an Amended Complaint filed in U.S. District Court for the Middle District of Louisiana alleging fraud on the part of Stone & Youngberg in connection with the 2007 formation of the Collybus CDO, which was manufactured by Cantor Fitzgerald & Co. (“Cantor”) and purchased by Commonwealth Advisors (“CA”) on behalf of several CA funds, as well as in connection with, among other things, Stone & Youngberg’s facilitation of subsequent trades of Collybus CDO securities by CA on behalf of the CA funds during 2007 and 2008. In the Amended Complaint, plaintiffs allege that they lost over $200 million during the financial crisis through mismanagement of the CA funds. In addition to the claims asserted against Stone & Youngberg, the Amended Complaint seeks to hold our company and Stifel liable for Stone & Youngberg’s alleged wrongdoing under theories of successor and alter ego liability, arising out of our company’s purchase of the membership interests of Stone & Youngberg in 2011 and the subsequent operation of that business. The original Complaint named Cantor, CA, and CA’s CEO, Walter Morales. The CA funds filed a Chapter 11 bankruptcy petition which stayed the original lawsuit until the reorganization plan was entered by the court in the fall of 2013. Shortly thereafter, the CA funds filed their first Amended Complaint, which is the first complaint that asserted claims against Stone & Youngberg, our company or Stifel. The action is now proceeding under a Fourth Amended Complaint. On September 29, 2016, the court postponed the trial for an extended, but undefined, period to consider various motions and other matters that will impact, among other things, the ultimate trial date and the issues to be tried. In a related action, approximately one dozen individual investors brought a direct action against the Company and other defendants, seeking recessionary damages of approximately $90 million. The court ruled that the individual plaintiffs had no standing to pursue these claims because the CA funds are separately pursuing claims. The individual plaintiffs have appealed this decision to the Fifth Circuit. While there can be no assurance of success, Stone & Youngberg intends to vigorously defend the claims against it, and our company and Stifel intend to vigorously defend the claims seeking to hold us responsible for Stone & Youngberg’s alleged liability.

Regulatory Capital Requirements

Regulatory Capital Requirements	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017, Stifel had net capital of $276.3 million, which was 17.7% of aggregate debit items and $245.0 million in excess of its minimum required net capital. At June 30, 2017, 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 June 30, 2017, 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, and Stifel Bank are subject to various regulatory capital requirements administered by the Federal and state banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possibly additional discretionary actions by regulators that, if undertaken, could have a direct material effect on our company’s and Stifel Bank’s financial results. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, our company and Stifel Bank 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 Stifel Bank’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings, and other factors. Our company and Stifel Bank are subject to Basel III. 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 Stifel Bank. Various aspects of Basel III will be subject to multi-year transition periods through December 31, 2018. Our company and Stifel Bank are required to maintain minimum amounts and ratios of Total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), Tier 1 capital to average assets (as defined), and under rules defined in Basel III, Common equity Tier 1 capital to risk-weighted assets. Our company and Stifel Bank 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 Stifel Bank are each categorized as “well capitalized” under the regulatory framework for prompt corrective action. To be categorized as “well capitalized,” our company and Stifel Bank 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 June 30, 2017 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 $ 1,679,604 18.2 % $ 414,618 4.5 % $ 598,893 6.5 % Tier 1 capital 1,889,208 20.5 % 552,824 6.0 % 737,099 8.0 % Total capital 1,943,420 21.1 % 737,099 8.0 % 921,374 10.0 % Tier 1 leverage 1,889,208 10.3 % 734,557 4.0 % 918,196 5.0 % Stifel Bank – Federal Reserve Capital Amounts June 30, 2017 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 $ 972,080 14.9 % $ 294,562 4.5 % $ 425,479 6.5 % Tier 1 capital 972,080 14.9 % 392,750 6.0 % 523,667 8.0 % Total capital 1,028,447 15.7 % 523,667 8.0 % 654,583 10.0 % Tier 1 leverage 972,080 7.2 % 540,643 4.0 % 675,804 5.0 %

Interest Income And Interest Ex

Interest Income And Interest Expense	6 Months Ended
	Jun. 30, 2017
Banking And Thrift Interest [Abstract]
Interest Income And Interest Expense	NOTE 17 – Interest Income and Interest Expense The components of interest income and interest expense are as follows (in thousands) Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Interest income: Bank loans, net $ 48,729 $ 29,475 $ 93,489 $ 56,033 Investment securities 46,385 24,446 88,051 46,807 Margin balances 9,022 8,151 17,205 16,697 Inventory 4,346 4,519 8,582 9,017 Other 469 (811 ) 2,577 53 $ 108,951 $ 65,780 $ 209,904 $ 128,607 Interest expense: Senior notes $ 8,140 $ 8,179 $ 16,280 $ 16,354 Bank deposits 1,887 1,842 3,654 3,743 Federal Home Loan Bank advances 2,797 2,635 4,516 3,392 Other 3,820 4,606 8,090 7,884 $ 16,644 $ 17,262 $ 32,540 $ 31,373

Employee Incentive, Deferred Co

Employee Incentive, Deferred Compensation, And Retirement Plans	6 Months Ended
	Jun. 30, 2017
Share Based Compensation Allocation And Classification In Financial Statements [Abstract]
Employee Incentive, Deferred Compensation, And Retirement Plans	NOTE 18 – Employee Incentive, Deferred Compensation, and Retirement Plans We maintain several incentive stock award plans that provide for the granting of stock options, stock appreciation rights, restricted stock, performance award, stock units and debentures to our employees. We are permitted to issue new shares under all stock award plans approved by shareholders or to reissue our treasury shares. Awards under our company’s incentive stock award plans are granted at market value at the date of grant. The awards generally vest ratably over a one- to ten-year vesting period. All 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 these plans, we are authorized to grant an additional 5.9 million shares at June 30, 2017. Stock-based compensation expense included in compensation and benefits expense in the consolidated statements of operations for our company’s incentive stock award plans was $34.4 million and $65.9 million for the three months ended June 30, 2017 and 2016, respectively, and $65.6 million and $94.8 million for the six months ended June 30, 2017 and 2016, respectively. As a result of the adoption of a new accounting standard on January 1, 2017, we recognized an excess tax benefit from stock-based compensation of $0.2 million and $17.1 million in the provision for income taxes on the accompanying consolidated statements of operations for the three and six months ended June 30, 2017. We adopted the new guidance prospectively. During the three and six months ended June 30, 2016, the tax impact related to stock-based compensation was a provision of $1.0 million and $5.2 million, respectively. Stock Units A stock unit represents the right to receive a share of common stock from our company 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 its executive officers. Under the terms of the grants, the number of PRSUs that will vest and convert to shares will be based on the Company's achievement of the pre-determined performance objectives during the performance period. The PRSUs will be measured over a four-year performance period and vested over a five-year period. The number of shares converted has the potential to range from 0% to 200% based on how the Company performs during the performance period. Compensation expense is amortized on a straight-line basis over the service period based on the fair value of the award on the grant date. The Company’s pre-determined performance objectives must be met for the awards to vest. Employees forfeit unvested share units upon termination of employment with a corresponding reversal of compensation expense. At June 30, 2017, the total number of stock units outstanding was 19.6 million, of which 16.2 million were unvested. At June 30, 2017, the total number of PRSUs was 0.6 million, of which all were unvested. At June 30, 2017, there was unrecognized compensation cost for stock units of approximately $361.2 million, which is expected to be recognized over a weighted-average period of 3.0 years. Deferred Compensation Plans The Wealth Accumulation Plan (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 and debentures. Participants may elect to defer a portion of their incentive compensation. Deferred awards generally vest over a one- to eight-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 to defer a certain percentage of their gross commissions. As stipulated by the Plan, the financial advisors will defer 4% of their gross commissions. They have the option to 1) defer an additional 1% of gross commissions into company stock units with a 25% matching contribution, or 2) defer up to 2% in mutual funds, which earn a return based on the performance of index mutual funds as designated by our company or a fixed income option. The mutual fund deferral option does not include a company match. Financial advisors have no ownership in the mutual funds. Included in the investments in the consolidated statements of financial condition are investments in mutual funds of $12.4 million and $11.3 million at June 30, 2017 and December 31, 2016, respectively, that were purchased by our company to economically hedge, on an after-tax basis, its liability to the financial advisors who choose to base the performance of their return on the index mutual fund option. At June 30, 2017 and December 31, 2016, the deferred compensation liability related to the mutual fund option of $5.3 million and $8.6 million, respectively, is included in accrued compensation in the consolidated statements of financial condition. 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 $3.3 million and $1.6 million for the three months ended June 30, 2017 and 2016, respectively and $3.7 million and $2.9 million for the six months ended June 30, 2017 and 2016, respectively.

Off-Balance Sheet Credit Risk

Off-Balance Sheet Credit Risk	6 Months Ended
	Jun. 30, 2017
Concentration Risks Types No Concentration Percentage [Abstract]
Off-Balance Sheet Credit Risk	NOTE 19 – 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 three 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 June 30, 2017 and December 31, 2016, the fair value of securities accepted as collateral where we are permitted to sell or repledge the securities was $2.4 billion and $2.5 billion, respectively, and the fair value of the collateral that had been sold or repledged was $244.0 million and $268.5 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 Bank 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 June 30, 2017 and December 31, 2016, Stifel Bank had outstanding commitments to originate loans aggregating $213.2 million and $205.8 million, respectively. The commitments extended over varying periods of time, with all commitments at June 30, 2017, scheduled to be disbursed in the following three months. Through Stifel Bank, 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 Bank 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 Bank be obligated to perform under the standby letters of credit, it may seek recourse from the customer for reimbursement of amounts paid. At June 30, 2017 and December 31, 2016, Stifel Bank had outstanding letters of credit totaling $90.2 million and $88.9 million, respectively. A majority of the standby letters of credit commitments at June 30, 2017, 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 Bank uses the same credit policies in granting lines of credit as it does for on-balance sheet instruments. At June 30, 2017 and December 31, 2016, Stifel Bank had granted unused lines of credit to commercial and consumer borrowers aggregating $559.9 million and $492.5 million, respectively.

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2017
Segment Reporting Information Profit Loss [Abstract]
Segment Reporting	NOTE 20 – 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 Bank. 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 Stifel Bank. Stifel Bank segment provides 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 for certain administrative employees, compensation expense associated with the expensing of restricted stock awards with no continuing service requirements in conjunction with recent acquisitions, and all unallocated overhead cost associated with the execution of orders; processing of securities transactions; custody of client securities; receipt, identification, and delivery of funds and securities; compliance with regulatory and legal requirements; internal financial accounting and controls; and general administration and acquisition charges. Information concerning operations in these segments of business for the three and six months ended June 30, 2017 and 2016 is as follows (in thousands) Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Net revenues: (1) Global Wealth Management $ 451,990 $ 386,039 $ 894,722 $ 765,843 Institutional Group 276,153 260,920 513,620 502,196 Other (2,496 ) 5,186 (7,164 ) 4,080 $ 725,647 $ 652,145 $ 1,401,178 $ 1,272,119 Income/(loss) before income taxes: Global Wealth Management $ 153,237 $ 105,053 $ 295,289 $ 198,387 Institutional Group 52,892 42,414 92,764 71,705 Other (122,931 ) (131,674 ) (225,836 ) (210,386 ) $ 83,198 $ 15,793 $ 162,217 $ 59,706 (1) No individual client accounted for more than 10 percent of total net revenues for the three and six months ended June 30, 2017 or 2016. The following table presents our company’s total assets on a segment basis at June 30, 2017 and December 31, 2016 (in thousands) June 30, 2017 December 31, 2016 Global Wealth Management $ 16,692,046 $ 16,065,503 Institutional Group 2,464,369 2,657,183 Other 377,160 406,670 $ 19,533,575 $ 19,129,356 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 and six months ended June 30, 2017 and 2016, were as follows (in thousands) Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 United States $ 690,930 $ 611,984 $ 1,339,261 $ 1,193,721 United Kingdom 32,771 37,844 57,290 73,592 Other European 1,946 2,317 4,627 4,806 $ 725,647 $ 652,145 $ 1,401,178 $ 1,272,119

Earnings Per Share ("EPS")

Earnings Per Share ("EPS")	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 21 – Earnings Per Share (“EPS”) Basic EPS is computed by dividing earnings available to common shareholders by the weighted-average number of common shares outstanding. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the entity. Diluted earnings per share include dilutive stock options and stock units under the treasury stock method. The following table sets forth the computation of basic and diluted earnings per share for the three and six months ended June 30, 2017 and 2016 (in thousands, except per share data) Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Net income $ 52,811 $ 9,771 $ 118,323 $ 36,826 Preferred dividends 2,344 — 4,688 — Net income available to common shareholders $ 50,467 $ 9,771 $ 113,635 $ 36,826 Shares for basic and diluted calculation: Average shares used in basic computation 68,556 66,792 68,471 67,186 Dilutive effect of stock options and units (1) 11,465 9,190 11,920 8,898 Average shares used in diluted computation 80,021 75,982 80,391 76,084 Earnings per common share: Basic $ 0.74 $ 0.15 $ 1.66 $ 0.55 Diluted $ 0.63 $ 0.13 $ 1.41 $ 0.48 (1) Diluted earnings per share is computed on the basis of the weighted-average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. For the three and six months ended June 30, 2017 and 2016, the anti-dilutive effect from restricted stock units was immaterial.

Shareholders' Equity

Shareholders' Equity	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Shareholders' Equity	NOTE 22 – 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 June 30, 2017, the maximum number of shares that may yet be purchased under this plan was 7.1 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 June 30, 2017, we repurchased $13.0 million, or 0.3 million shares using existing Board authorizations at an average price of $43.83 per share to meet obligations under our company’s employee benefit plans and for general corporate purposes. There were no share repurchases in the first quarter of 2017. During the three and six months ended June 30, 2016, we repurchased $3.7 million and $95.1 million, or 0.1 million and 2.8 million shares, respectively, using existing Board authorizations at an average price of $29.70 and $33.79 per share, respectively, to meet obligations under our company’s employee benefit plans and for general corporate purposes. Issuance of Common Stock On January 3, 2017, we issued 0.2 million shares related to the purchase of City Securities. During the six months ended June 30, 2017, we issued 1.7 million shares, which were reissued from treasury. Share issuances were primarily a result of the vesting and exercise transactions under our incentive stock award plans and shares issued as part of the purchase consideration in our acquisition of City Securities.

Variable Interest Entities

Variable Interest Entities	6 Months Ended
	Jun. 30, 2017
Variable Interest Entity Not Primary Beneficiary Disclosures [Abstract]
Variable Interest Entities	NOTE 23 – 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 $167.9 million at June 30, 2017. For those funds where we act as the general partner, our company’s economic interest is generally limited to management fee arrangements as stipulated by the fund operating agreements. We have generally provided the third-party investors with rights to terminate the funds or to remove us as the general partner. Management fee revenue earned by our company was insignificant during the three and six months ended June 30, 2017 and 2016. In addition, our direct investment interest in these entities is insignificant at June 30, 2017 and December 31, 2016. 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 $315.6 million at June 30, 2017. 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 June 30, 2017. Management fee revenue earned by our company was insignificant during the three and six months ended June 30, 2017 and 2016. 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. Interest in FSI Group, LLC (“FSI”) We have provided financing of $18.0 million in the form of a convertible promissory note to FSI, a limited liability company specializing in investing in banks, thrifts, insurance companies, and other financial services firms. In February 2013, the convertible promissory note was amended and restated. The convertible promissory note matures in April 2018; however, FSI has three five-year extension options. The note is convertible at our election into a 49.9% interest in FSI only after the last extension option. The convertible promissory note has a minimum coupon rate equal to 8% per annum plus additional interest related to certain defined cash flows of the business, not to exceed 18% per annum. As we do not hold the power to direct the activities of FSI nor to absorb a majority of the expected losses, or receive a majority of the expected benefits, it was determined that we are not required to consolidate this entity. Our company’s exposure to loss is limited to the carrying value of the note with FSI at June 30, 2017, of $18.0 million, which is included in other assets in the consolidated statements of financial condition. Our company had no liabilities related to this entity at June 30, 2017. We have the discretion to make additional capital contributions. We have not provided financial or other support to FSI that we were not previously contractually required to provide as of June 30, 2017. Our company’s involvement with FSI has not had a material effect on our consolidated financial position, operations, or cash flows.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	NOTE 24 – 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.

Recently Issued Accounting Gu32

Recently Issued Accounting Guidance (Policies)	6 Months Ended
	Jun. 30, 2017
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 3, 2017, the Company completed the acquisition of City Financial Corporation and its wholly owned subsidiary, City Securities Corporation (“City Securities”), an independent investment bank focused primarily on offering wealth management and public finance services across the Midwest. The acquisition was funded with cash from operations and common stock.
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 Bank & Trust (“Stifel Bank”). All material intercompany balances and transactions have been eliminated. 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, 2016 on file with the SEC. Certain amounts from prior periods have been reclassified to conform to the current period’s presentation. During the first quarter of 2017, we adopted Accounting Standards Update (“ASU”) 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting. Amounts previously reported for the three and six months ended June 30, 2016 have been restated as required upon adoption of the ASU. See Note 2 for further discussion. There have been no material changes in our significant accounting policies, as compared to the significant accounting policies described in our Annual Report on Form 10-K for the year ended December 31, 2016, with the exception of the new guidance on stock-based compensation.

Nature of Operations and Basi33

Nature of Operations and Basis Of Presentation (Policies)	6 Months Ended
	Jun. 30, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Recently Adopted Accounting Guidance	Recently Adopted Accounting Guidance Share-Based Payments In March 2016, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-09, “Improvements to Employee Share-Based Payment Accounting” that requires an entity to record all excess tax benefits and tax deficiencies as an income tax benefit or expense in the income statement. The update no longer requires cash flows related to excess tax benefits to be presented as a financing activity separate from other income tax cash flows. The update also clarifies that all cash payments to taxing authorities made on an employee's behalf for withheld shares should be presented as a financing activity on the statement of cash flows and requires an entity to elect an accounting policy to either estimate the number of forfeitures or account for forfeitures when they occur. The guidance is effective for fiscal years beginning after December 15, 2016 (January 1, 2017 for our company). We adopted the guidance in the update on January 1, 2017, and during the six months ended June 30, 2017 recognized an excess tax benefit from stock-based compensation of $17.1 million in the provision for income taxes on the accompanying consolidated statements of operations (adopted prospectively). Excess tax benefits from stock based compensation are now classified in operating activities on the accompanying consolidated statement of cash flows instead of being separately stated in financing activities for the six months ended June 30, 2017 (adopted prospectively). Cash paid to a tax authority by our company when withholding shares from an employee’s award for tax-withholding purposes are now classified as a financing activity in the accompanying consolidated statement of cash flows (adopted retrospectively). We reclassified $38.1 million from operating activities to financing activities in the accompanying consolidated statement of cash flows for the six months ended June 30, 2016 pertaining to shares withheld from employee awards for tax withholding purposes. Following the adoption of ASU 2016-09, we will continue to estimate forfeitures.
Goodwill Impairment Testing	Goodwill Impairment Testing In January 2017, the FASB issued ASU No. 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 new guidance, 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. In addition, income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit should be considered when measuring the goodwill impairment loss, if applicable. The amendments also eliminate the requirements for any reporting unit with a zero or negative carrying amount to perform a qualitative assessment and, if it fails that qualitative test, to perform Step 2 of the goodwill impairment test. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The amendments are to be applied on a prospective basis. The guidance is effective for annual or any interim impairment tests in fiscal years beginning after December 15, 2019 (January 1, 2020 for our company). Early adoption is permitted. We are currently evaluating the effect that the new guidance will have on our consolidated financial statements.
Statement of Cash Flow – Restricted Cash	Statement of Cash Flow – Restricted Cash In November 2016, the FASB issued ASU 2016-18, "Statement of Cash Flow - Restricted Cash," which adds or clarifies guidance on the classification and presentation of restricted cash in the statement of cash flows. The ASU is effective for the fiscal year beginning after December 15, 2017 (January 1, 2018 for our Company). Early adoption is permitted. We are currently evaluating the effect that the new guidance will have on our consolidated financial statements.
Financial Instruments - Credit Losses	Financial Instruments – Credit Losses In June 2016, the FASB issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments.” For trade receivables, loans, and held-to-maturity debt securities, the current probable loss recognition methodology is being replaced by an expected credit loss model. For available-for-sale debt securities, the recognition model on credit losses is generally unchanged, except the losses will be presented as an adjustable allowance. The guidance is effective for fiscal years beginning after December 15, 2019 (January 1, 2020 for our Company), including interim periods within that reporting period. Early adoption is permitted for annual periods beginning after December 15, 2018. We have been closely monitoring FASB activity related to the new standard. During the second half of 2016, we began developing a plan regarding the evaluation of the potential changes from adopting the new standard on our future financial reporting and disclosures. We expect to adopt the requirements of the new standard in the first quarter of 2020.
Leases	Leases In February 2016, the FASB issued ASU No. 2016-02, “Leases” that requires lessees to recognize a right-of-use asset and a lease liability on the balance sheet for all leases with the exception of short-term leases. For lessees, leases will continue to be classified as either operating or finance leases in the income statement. Lessor accounting is similar to the current model but updated to align with certain changes to the lessee model. Lessors will continue to classify leases as operating, direct financing or sales-type leases. The new standard must be adopted using a modified retrospective transition and requires application of the new guidance at the beginning of the earliest comparative period presented. The guidance is effective for fiscal years beginning after December 15, 2018 (January 1, 2019 for our company). Early adoption is permitted. We have been closely monitoring FASB activity related to the new standard. During the second half of 2016, we began developing a plan regarding the evaluation of the potential changes from adopting the new standard on our future financial reporting and disclosures. We also made progress on our contract reviews and detailed policy drafting. Based on our evaluation, we expect to adopt the requirements of the new standard in the first quarter of 2019 and anticipate using the modified retrospective approach.
Financial Assets and Financial Liabilities	Financial Assets and Financial Liabilities In January 2016, the FASB issued ASU No. 2016-01, “Recognition and Measurement of Financial Assets and Financial Liabilities” that will change the income statement impact of equity investments held by an entity, and the recognition of changes in fair value of financial liabilities when the fair value option is elected. The guidance is effective for fiscal years beginning after December 15, 2017 (January 1, 2018 for our company). We are currently evaluating the effect that the new guidance will have on our consolidated financial statements.
Revenue Recognition	Revenue Recognition In April 2016, the FASB issued ASU No. 2016-10, “Identifying Performance Obligations and Licensing” that amends the revenue guidance in ASU 2014-09 on identifying performance obligations. The effective date of the new guidance will coincide with ASU 2014-09 during the first quarter 2018. In March 2016, the FASB issued ASU No. 2016-08, “Principal versus Agent Considerations (Reporting Revenue Gross versus Net)” (“ASU 2016-08”) that amends the principal versus agent guidance in ASU 2014-09. ASU 2016-08 clarifies that the analysis must focus on whether the entity has control of the goods or services before they are transferred to the customer. ASU 2016-08 also provides additional guidance about how to apply the control principle when services are provided and when goods or services are combined with other goods or services. The effective date of the standard for the Company will coincide with ASU 2014-09 during the first quarter 2018. In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)," ("ASU 2014-09") that supersedes current revenue recognition guidance, including most industry-specific guidance. ASU 2014-09 requires a company to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods and services. The guidance also requires additional disclosures regarding the nature, amount, timing and uncertainty of revenue that is recognized. The FASB has approved a one year deferral of this standard, and this pronouncement is now effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period and is to be applied using one of two retrospective application methods, with early application not permitted. We have been closely monitoring FASB activity related to the new standard. Our implementation efforts include the identification of revenue within the scope of the guidance, and the potential impact on its consolidated results of operations and disclosures. The current broker dealer industry treatment of netting deal expenses with investment banking revenues, the timing of performance fee recognition related to consolidated alternative asset management entities, and fees received for equity research may be impacted by the new guidance. We are also evaluating whether certain asset management contract costs can be capitalized on the consolidated statements of financial position. We expect to adopt the requirements of the new standard in the first quarter of 2018 and anticipate using the modified retrospective approach.

Receivables From And Payables34

Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Tables)	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and December 31, 2016, included (in thousands) June 30, 2017 December 31, 2016 Receivables from clearing organizations $ 153,241 $ 568,373 Deposits paid for securities borrowed 145,285 382,691 Securities failed to deliver 60,234 73,688 $ 358,760 $ 1,024,752
Amounts Payable To Brokers, Dealers, And Clearing Organizations	June 30, 2017 December 31, 2016 Deposits received from securities loaned $ 352,127 $ 478,814 Securities failed to receive 50,315 27,882 Payable to clearing organizations 30,901 16,411 $ 433,343 $ 523,107

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Schedule Of Fair Value Of Investments In And Unfunded Commitments To Funds Measured At Net Asset Value	June 30, 2017 Fair value of investments Unfunded commitments Partnership interests $ 5,806 $ 1,348 Mutual funds 12,441 — Private equity funds 8,673 1,856 Money market funds 16,365 — Total $ 43,285 $ 3,204 December 31, 2016 Fair value of investments Unfunded commitments Private company investments $ 18,763 $ 8,526 Partnership interests 15,798 1,822 Mutual funds 11,301 — Private equity funds 9,310 2,020 Money market funds 35,637 — Total $ 90,809 $ 12,368
Fair Value Of Assets And Liabilities Measured On Recurring Basis	June 30, 2017 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 16,924 $ 16,924 $ — $ — U.S. government agency securities 119,703 — 119,703 — Mortgage-backed securities: Agency 313,463 — 313,463 — Non-agency 54,566 — 54,041 525 Corporate securities: Fixed income securities 367,866 7,443 360,167 256 Equity securities 43,671 43,304 — 367 State and municipal securities 147,458 — 147,458 — Total financial instruments owned 1,063,651 67,671 994,832 1,148 Available-for-sale securities: U.S. government agency securities 4,565 199 4,366 — State and municipal securities 72,382 — 72,382 — Mortgage-backed securities: Agency 319,062 — 319,062 — Commercial 72,688 — 72,688 — Non-agency 1,617 — 1,617 — Corporate fixed income securities 971,131 — 971,131 — Asset-backed securities 2,013,928 — 2,013,928 — Total available-for-sale securities 3,455,373 199 3,455,174 — Investments: Corporate equity securities 50,384 50,144 — 240 Auction rate securities: Equity securities 48,577 — 13,956 34,621 Municipal securities 841 — — 841 Other 1,610 — 370 1,240 Investments in funds measured at NAV 26,920 Total investments 128,332 50,144 14,326 36,942 Cash equivalents measured at NAV 16,365 Derivative contracts (1) 8,442 $ 8,442 $ 4,672,163 $ 118,014 $ 4,472,774 $ 38,090 (1) June 30, 2017 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 298,832 $ 298,832 $ — $ — U.S. government agency securities 1,995 — 1,995 — Mortgage-backed securities Agency 118,458 — 118,458 — Non-agency 16 — 16 — Corporate securities: Fixed income securities 245,148 317 244,831 — Equity securities 41,091 41,091 — — State and municipal securities 37 — 37 — Total financial instruments sold, but not yet purchased 705,577 340,240 365,337 — Derivative contracts (2) 939 939 $ 706,516 $ 340,240 $ 366,276 $ — (2) Included in accounts payable and accrued expenses in the consolidated statements of financial condition. Assets and liabilities measured at fair value on a recurring basis as of December 31, 2016, are presented below (in thousands) December 31, 2016 Total Level 1 Level 2 Level 3 Financial instruments owned: U.S. government securities $ 9,951 $ 9,951 $ — $ — U.S. government agency securities 89,833 — 89,833 — Mortgage-backed securities: Agency 305,774 — 305,774 — Non-agency 28,402 — 27,320 1,082 Corporate securities: Fixed income securities 299,946 1,944 297,729 273 Equity securities 32,044 31,444 — 600 State and municipal securities 159,095 — 159,095 — Total financial instruments owned 925,045 43,339 879,751 1,955 Available-for-sale securities: U.S. government agency securities 4,197 300 3,897 — State and municipal securities 72,490 — 72,490 — Mortgage-backed securities: Agency 338,732 — 338,732 — Commercial 72,773 — 72,773 — Non-agency 1,892 — 1,892 — Corporate fixed income securities 823,511 — 823,511 — Asset-backed securities 1,867,718 — 1,867,718 — Total available-for-sale securities 3,181,313 300 3,181,013 — Investments: Corporate equity securities 27,247 23,414 — 3,833 Auction rate securities: Equity securities 48,689 — — 48,689 Municipal securities 832 — — 832 Other 1,623 — 383 1,240 Investments measured at NAV 55,172 Total investments 133,563 23,414 383 54,594 Cash equivalents measured at NAV 35,637 Derivative contracts (1) 10,390 — 10,390 — $ 4,285,948 $ 67,053 $ 4,071,537 $ 56,549 (1) December 31, 2016 Total Level 1 Level 2 Level 3 Liabilities: Financial instruments sold, but not yet purchased: U.S. government securities $ 362,536 $ 362,536 $ — $ — U.S. government agency securities 20,549 — 20,549 — Mortgage-backed securities Agency 94,552 — 94,552 — Non-agency 1 — 1 — Corporate securities: Fixed income securities 202,968 980 201,988 — Equity securities 18,395 18,395 — — State and municipal securities 31 — 31 — Total financial instruments sold, but not yet purchased 699,032 381,911 317,121 — Derivative contracts (2) 1,823 — 1,823 — $ 700,855 $ 381,911 $ 318,944 $ — (2) Included in accounts payable and accrued expenses in the consolidated statements of financial condition.
Schedule Of Changes In Fair Value Associated With Level 3 Financial Instruments	Three Months Ended June 30, 2017 Financial instruments owned Investments Mortgage- Backed Securities – Non-Agency Fixed Income Securities Equity Securities Corporate Equity Securities Auction Securities – Equity Auction Rate Securities – Municipal Other Balance at March 31, 2017 $ 1,019 $ 267 $ 583 $ 3,833 $ 49,055 $ 837 $ 1,240 Unrealized gains/(losses): Included in changes in net assets (1) (100 ) — (216 ) — 251 4 — Included in OCI (2) — — — — — — — Realized gains/(losses) (1) 96 — — — — — — Purchases — — — — — — — Sales (324 ) — — — — — — Redemptions (166 ) (11 ) — — — — — Transfers: Into Level 3 — — — — — — — Out of Level 3 — — — (3,593 ) (14,685 ) — — Net change (494 ) (11 ) (216 ) (3,593 ) (14,434 ) 4 — Balance at June 30, 2017 $ 525 $ 256 $ 367 $ 240 $ 34,621 $ 841 $ 1,240 (1) Realized and unrealized gains/(losses) related to financial instruments owned and investments are reported in other income in the consolidated statements of operations. (2) Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss in the consolidated statements of financial condition. Six Months Ended June 30, 2017 Financial instruments owned Investments Mortgage- Backed Securities – Non-Agency Fixed Income Securities Equity Securities Corporate Equity Securities Auction Securities – Equity Auction Rate Securities – Municipal Other Balance at December 31, 2016 $ 1,082 $ 273 $ 600 $ 3,833 $ 48,689 $ 832 $ 1,240 Unrealized gains/(losses): Included in changes in net assets (1) (100 ) — (233 ) — 617 9 — Included in OCI (2) — — — — — — — Realized gains/(losses) (1) 97 — — — — — — Purchases — — — — — — — Sales (324 ) — — — — — — Redemptions (230 ) (17 ) — — — — — Transfers: Into Level 3 — — — — — — — Out of Level 3 — — — (3,593 ) (14,685 ) — — Net change (557 ) (17 ) (233 ) (3,593 ) (14,068 ) 9 — Balance at June 30, 2017 $ 525 $ 256 $ 367 $ 240 $ 34,621 $ 841 $ 1,240 (1) Realized and unrealized gains/(losses) related to financial instruments owned and investments are reported in other income in the consolidated statements of operations. (2) Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss in the consolidated statements of financial.
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 1.2% - 10.5% 5.2% Workout period 1 - 3 years 2.2 years Municipal securities Discounted cash flow Discount rate 1.6% - 9.4% 3.9% Workout period 1 - 4 years 1.9 years
Schedule Of Fair Value Of Financial Instruments	June 30, 2017 December 31, 2016 Carrying Value Estimated Fair Value Carrying Value Estimated Fair Value Financial assets: Cash and cash equivalents $ 678,054 $ 678,054 $ 912,932 $ 912,932 Cash segregated for regulatory purposes 150 150 73,235 73,235 Securities purchased under agreements to resell 478,091 478,091 248,588 248,588 Financial instruments owned 1,063,651 1,063,651 925,045 925,045 Available-for-sale securities 3,455,373 3,455,373 3,181,313 3,181,313 Held-to-maturity securities 3,307,970 3,321,880 3,038,405 3,040,554 Loans held for sale 139,676 139,676 228,588 228,588 Bank loans 6,160,093 5,994,527 5,591,190 5,633,804 Investments 128,332 128,332 133,563 133,563 Derivative contracts (1) 8,442 8,442 10,390 10,390 Financial liabilities: Securities sold under agreements to repurchase $ 243,999 $ 243,999 $ 268,546 $ 268,546 Bank deposits 12,050,474 11,366,970 11,527,483 11,092,185 Financial instruments sold, but not yet purchased 705,577 705,577 699,032 699,032 Derivative contracts (2) 939 939 1,823 1,823 Federal Home Loan Bank advances 790,000 790,000 500,000 500,000 Borrowings 105,000 105,000 377,000 377,000 Senior notes 796,296 811,318 795,891 799,632 Debentures to Stifel Financial Capital Trusts 67,500 50,413 67,500 52,525 (1) (2) Included in accounts payable and accrued expenses in the consolidated statements of financial condition.
Estimated Fair Values Of Financial Instruments Not Measured At Fair Value	June 30, 2017 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 661,689 $ 661,689 $ — $ — Cash segregated for regulatory purposes 150 150 — — Securities purchased under agreements to resell 478,091 478,091 — — Held-to-maturity securities 3,321,880 — 3,119,542 202,338 Loans held for sale 139,676 — 139,676 — Bank loans 5,994,527 — 5,994,527 — Financial liabilities: Securities sold under agreements to repurchase $ 243,999 $ — $ 243,999 $ — Bank deposits 11,366,970 — 11,366,970 — Federal Home Loan Bank advances 790,000 790,000 — — Borrowings 105,000 105,000 — — Senior notes 811,318 811,318 — — Debentures to Stifel Financial Capital Trusts 50,413 — — 50,413 December 31, 2016 Total Level 1 Level 2 Level 3 Financial assets: Cash $ 877,295 $ 877,295 $ — $ — Cash segregated for regulatory purposes 73,235 73,235 — — Securities purchased under agreements to resell 248,588 227,983 20,605 — Held-to-maturity securities 3,040,554 — 2,830,869 209,685 Loans held for sale 228,588 — 228,588 — Bank loans 5,633,804 — 5,633,804 — Financial liabilities: Securities sold under agreements to repurchase $ 268,546 $ 149,881 $ 118,665 $ — Bank deposits 11,092,185 — 11,092,185 — Federal Home Loan Bank advances 500,000 500,000 — — Borrowings 377,000 377,000 — — Senior notes 799,632 799,632 — — Debentures to Stifel Financial Capital Trusts 52,525 — — 52,525

Financial Instruments Owned A36

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Tables)	6 Months Ended
	Jun. 30, 2017
Trading Securities Balance Sheet Reported Amounts [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 June 30, 2017 and December 31, 2016 are as follows (in thousands) June 30, 2017 December 31, 2016 Financial instruments owned: U.S. government securities $ 16,924 $ 9,951 U.S. government agency securities 119,703 89,833 Mortgage-backed securities: Agency 313,463 305,774 Non-agency 54,566 28,402 Corporate securities: Fixed income securities 367,866 299,946 Equity securities 43,671 32,044 State and municipal securities 147,458 159,095 $ 1,063,651 $ 925,045 Financial instruments sold, but not yet purchased: U.S. government securities $ 298,832 $ 362,536 U.S. government agency securities 1,995 20,549 Mortgage-backed securities: Agency 118,458 94,552 Non-agency 16 1 Corporate securities: Fixed income securities 245,148 202,968 Equity securities 41,091 18,395 State and municipal securities 37 31 $ 705,577 $ 699,032

Available-For-Sale And Held-T37

Available-For-Sale And Held-To-Maturity Securities (Tables)	6 Months Ended
	Jun. 30, 2017
Investments Debt And Equity Securities [Abstract]
Schedule Of Amortized Cost And Fair Values Of Available For Sale Securities And Held To Maturity Securities	June 30, 2017 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 4,584 $ — $ (19 ) $ 4,565 State and municipal securities 75,685 2 (3,305 ) 72,382 Mortgage-backed securities: Agency 321,352 131 (2,421 ) 319,062 Commercial 76,131 42 (3,485 ) 72,688 Non-agency 1,721 — (104 ) 1,617 Corporate fixed income securities 971,867 2,843 (3,579 ) 971,131 Asset-backed securities 2,000,561 13,367 — 2,013,928 $ 3,451,901 $ 16,385 $ (12,913 ) $ 3,455,373 Held-to-maturity securities (2) Mortgage-backed securities: Agency $ 1,454,314 $ 16,885 $ (14,474 ) $ 1,456,725 Commercial 59,518 2,088 — 61,606 Asset-backed securities 1,754,093 11,405 (2,063 ) 1,763,435 Corporate fixed income securities 40,045 69 — 40,114 $ 3,307,970 $ 30,447 $ (16,537 ) $ 3,321,880 December 31, 2016 Amortized Cost Gross Unrealized Gains (1) Gross Unrealized Losses (1) Estimated Fair Value Available-for-sale securities U.S. government agency securities $ 4,213 $ 2 $ (18 ) $ 4,197 State and municipal securities 76,066 — (3,576 ) 72,490 Mortgage-backed securities: Agency 340,738 298 (2,304 ) 338,732 Commercial 77,417 59 (4,703 ) 72,773 Non-agency 2,032 — (140 ) 1,892 Corporate fixed income securities 830,695 1,418 (8,602 ) 823,511 Asset-backed securities 1,858,929 9,857 (1,068 ) 1,867,718 $ 3,190,090 $ 11,634 $ (20,411 ) $ 3,181,313 Held-to-maturity securities (2) Mortgage-backed securities: Agency $ 1,567,758 $ 14,537 $ (17,037 ) $ 1,565,258 Commercial 59,581 1,786 — 61,367 Non-agency 688 — (13 ) 675 Asset-backed securities 1,370,300 6,242 (3,396 ) 1,373,146 Corporate fixed income securities 40,078 30 — 40,108 $ 3,038,405 $ 22,595 $ (20,446 ) $ 3,040,554 (1) Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss. (2) Held-to-maturity securities are carried in the consolidated statements of financial condition at amortized cost, and the changes in the value of these securities, other than impairment charges, are not reported on the consolidated financial statements.
Schedule Of Amortized Cost And Fair Values Of Debt Securities By Contractual Maturity	June 30, 2017 Available-for-sale securities Held-to-maturity securities Amortized Cost Estimated Fair Value Amortized Cost Estimated Fair Value Debt securities Within one year $ 142,136 $ 142,514 $ 40,045 $ 40,114 After one year through three years 138,597 139,032 — — After three years through five years 432,593 432,306 — — After five years through ten years 702,630 703,979 335,011 335,513 After ten years 1,636,741 1,644,175 1,419,082 1,427,922 Mortgage-backed securities After three years through five years — — 59,518 61,606 After five years through ten years 58,618 55,846 162,429 161,038 After ten years 340,586 337,521 1,291,885 1,295,687 $ 3,451,901 $ 3,455,373 $ 3,307,970 $ 3,321,880
Contractual Maturities	The maturities of our available-for-sale (fair value) and held-to-maturity (amortized cost) securities at June 30, 2017, 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 $ 824 $ 3,741 $ — $ — $ 4,565 State and municipal securities 200 375 16,738 55,069 72,382 Mortgage-backed securities: Agency — — 412 318,650 319,062 Commercial — — 55,434 17,254 72,688 Non-agency — — — 1,617 1,617 Corporate fixed income securities 141,490 567,222 262,419 — 971,131 Asset-backed securities — — 424,822 1,589,106 2,013,928 $ 142,514 $ 571,338 $ 759,825 $ 1,981,696 $ 3,455,373 Held-to-maturity: Mortgage-backed securities: Agency $ — $ — $ 162,429 $ 1,291,885 $ 1,454,314 Commercial — 59,518 — — 59,518 Asset-backed securities — — 335,011 1,419,082 1,754,093 Corporate fixed income securities 40,045 — — — 40,045 $ 40,045 $ 59,518 $ 497,440 $ 2,710,967 $ 3,307,970 (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 June 30, 2017 (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 $ (19 ) $ 4,565 $ — $ — $ (19 ) $ 4,565 State and municipal securities (261 ) 9,765 (3,044 ) 60,113 (3,305 ) 69,878 Mortgage-backed securities: Agency (604 ) 155,073 (1,817 ) 133,664 (2,421 ) 288,737 Commercial (3,485 ) 71,139 — — (3,485 ) 71,139 Non-agency — — (104 ) 1,585 (104 ) 1,585 Corporate fixed income securities (3,579 ) 396,324 — — (3,579 ) 396,324 $ (7,948 ) $ 636,866 $ (4,965 ) $ 195,362 $ (12,913 ) $ 832,228 Held-to-maturity securities Mortgage-backed securities: Agency $ (14,457 ) $ 830,887 $ (17 ) $ 1,165 $ (14,474 ) $ 832,052 Asset-backed securities (312 ) 116,997 (1,751 ) 34,391 (2,063 ) 151,388 $ (14,769 ) $ 947,884 $ (1,768 ) $ 35,556 $ (16,537 ) $ 983,440

Bank Loans (Tables)

Bank Loans (Tables)	6 Months Ended
	Jun. 30, 2017
Receivables [Abstract]
Schedule Of Balance And Associated Percentage Of Each Major Loan Category In Bank Loan Portfolio	June 30, 2017 December 31, 2016 Balance Percent Balance Percent Residential real estate $ 2,248,528 36.2 % $ 2,161,400 38.4 % Commercial and industrial 2,064,052 33.2 1,710,399 30.3 Securities-based loans 1,755,592 28.3 1,614,033 28.6 Commercial real estate 71,517 1.2 78,711 1.4 Consumer 42,666 0.7 45,391 0.8 Home equity lines of credit 14,303 0.2 15,008 0.3 Construction and land 17,155 0.2 12,623 0.2 Gross bank loans 6,213,813 100.0 % 5,637,565 100.0 % Unamortized loan premium/(discount), net 1,113 858 Unamortized loan fees, net of loan fees 75 (49 ) Loans in process (706 ) (2,021 ) Allowance for loan losses (54,202 ) (45,163 ) Bank loans, net $ 6,160,093 $ 5,591,190
Activity In The Allowance For Loan Losses By Portfolio Segment	Three Months Ended June 30, 2017 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 38,789 $ 2,266 $ (250 ) $ — $ 40,805 Securities-based loans 3,393 207 — — 3,600 Consumer 107 (2 ) — — 105 Residential real estate 4,190 1,379 — — 5,569 Commercial real estate 1,618 2,017 (2,703 ) — 932 Home equity lines of credit 285 (3 ) — 1 283 Construction and land 437 (213 ) — — 224 Qualitative 2,479 205 — — 2,684 $ 51,298 $ 5,856 $ (2,953 ) $ 1 $ 54,202 Six Months Ended June 30, 2017 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 35,127 $ 5,928 $ (250 ) $ — $ 40,805 Securities-based loans 3,094 506 — — 3,600 Consumer 129 (24 ) — — 105 Residential real estate 2,660 2,909 — — 5,569 Commercial real estate 1,363 2,272 (2,703 ) — 932 Home equity lines of credit 371 (89 ) — 1 283 Construction and land 232 (8 ) — — 224 Qualitative 2,187 497 — — 2,684 $ 45,163 $ 11,991 $ (2,953 ) $ 1 $ 54,202 Three Months Ended June 30, 2016 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 27,700 $ 2,116 $ — $ — $ 29,816 Securities-based loans 1,605 126 — — 1,731 Consumer 84 23 — — 107 Residential real estate 1,330 210 (13 ) 2 1,529 Commercial real estate 1,289 (780 ) — 3 512 Home equity lines of credit 267 16 — — 283 Construction and land 118 26 — — 144 Qualitative 1,657 87 — — 1,744 $ 34,050 $ 1,824 $ (13 ) $ 5 $ 35,866 Six Months Ended June 30, 2016 Beginning Balance Provision Charge-offs Recoveries Ending Balance Commercial and industrial $ 24,748 $ 5,068 $ — $ — $ 29,816 Securities-based loans 1,607 124 — — 1,731 Consumer 105 2 — — 107 Residential real estate 1,241 298 (13 ) 3 1,529 Commercial real estate 264 241 — 7 512 Home equity lines of credit 290 (7 ) — — 283 Construction and land 78 66 — — 144 Qualitative 1,454 290 — — 1,744 $ 29,787 $ 6,082 $ (13 ) $ 10 $ 35,866
Recorded Balance 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 Residential real estate $ 24 $ 5,545 $ 5,569 $ 174 $ 2,248,354 $ 2,248,528 Commercial and industrial 2,155 38,650 40,805 13,949 2,050,103 2,064,052 Securities-based loans — 3,600 3,600 — 1,755,592 1,755,592 Commercial real estate — 932 932 — 71,517 71,517 Consumer 4 101 105 4 42,662 42,666 Home equity lines of credit 149 134 283 323 13,980 14,303 Construction and land — 224 224 — 17,155 17,155 Qualitative — 2,684 2,684 — — — $ 2,332 $ 51,870 $ 54,202 $ 14,450 $ 6,199,363 $ 6,213,813 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 Residential real estate $ 24 $ 2,636 $ 2,660 $ 178 $ 2,161,222 $ 2,161,400 Commercial and industrial 2,392 32,735 35,127 16,815 1,693,584 1,710,399 Securities-based loans — 3,094 3,094 — 1,614,033 1,614,033 Commercial real estate 722 641 1,363 9,522 69,189 78,711 Consumer 6 123 129 6 45,385 45,391 Home equity lines of credit 231 140 371 413 14,595 15,008 Construction and land — 232 232 — 12,623 12,623 Qualitative — 2,187 2,187 — — — $ 3,375 $ 41,788 $ 45,163 $ 26,934 $ 5,610,631 $ 5,637,565
Loans That Were Individually Evaluated For Impairment By Portfolio Segment	June 30, 2017 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 13,949 $ — $ 13,949 $ 13,949 $ 2,155 $ 16,921 Consumer 679 — 4 4 4 7 Residential real estate 174 — 174 174 24 176 Home equity lines of credit 323 — 323 323 149 323 Total $ 15,125 $ — $ 14,450 $ 14,450 $ 2,332 $ 17,427 December 31, 2016 Unpaid Contractual Principal Balance Recorded Investment with No Allowance Recorded Investment with Allowance Total Recorded Investment Related Allowance Average Recorded Investment Commercial and industrial $ 16,815 $ — $ 16,815 $ 16,815 $ 2,392 $ 22,559 Commercial real estate 10,503 — 9,522 9,522 722 9,080 Consumer 833 — 6 6 6 9 Home equity lines of credit 413 — 413 413 231 413 Residential real estate 178 — 178 178 24 181 Total $ 28,742 $ — $ 26,934 $ 26,934 $ 3,375 $ 32,242
Aging Of The Recorded Investment In Past Due Loans	As of June 30, 2017 30 – 89 Days Past Due 90 or More Days Past Due Total Due Current Balance Total Residential real estate $ 1,035 $ — $ 1,035 $ 2,247,493 $ 2,248,528 Commercial and industrial — — — 2,064,052 2,064,052 Securities-based loans — — — 1,755,592 1,755,592 Commercial real estate — — — 71,517 71,517 Consumer 6 2 8 42,658 42,666 Home equity lines of credit — 184 184 14,119 14,303 Construction and land — — — 17,155 17,155 Total $ 1,041 $ 186 $ 1,227 $ 6,212,586 $ 6,213,813 As of June 30, 2017 * Non-Accrual Restructured (1) Total Commercial and industrial $ 4,951 $ 8,998 $ 13,949 Home equity lines of credit 323 — 323 Residential real estate — 174 174 Consumer 4 — 4 Total $ 5,278 $ 9,172 $ 14,450 (1) On non-accrual status. * There were no loans past due 90 days and still accruing interest at June 30, 2017. As of December 31, 2016 30 – 89 Days Past Due 90 or More Days Past Due Total Past Due Current Balance Total Residential real estate $ 1,923 $ — $ 1,923 $ 2,159,477 $ 2,161,400 Commercial and industrial — — — 1,710,399 1,710,399 Securities-based loans — — — 1,614,033 1,614,033 Commercial real estate 9,522 — 9,522 69,189 78,711 Consumer — 2 2 45,389 45,391 Home equity lines of credit 78 196 274 14,734 15,008 Construction and land — — — 12,623 12,623 Total $ 11,523 $ 198 $ 11,721 $ 5,625,844 $ 5,637,565 As of December 31, 2016* Non-Accrual Restructured Total Commercial and industrial $ 16,815 $ — $ 16,815 Commercial real estate — 9,522 9,522 Home equity lines of credit 413 — 413 Residential real estate — 178 178 Consumer 6 — 6 Total $ 17,234 $ 9,700 $ 26,934 * There were no loans past due 90 days and still accruing interest at December 31, 2016.
Risk Category Of Loan Portfolio	As of June 30, 2017 Pass Special Substandard Doubtful Total Residential real estate $ 2,248,238 $ 116 $ 174 $ — $ 2,248,528 Commercial and industrial 2,035,973 12,635 15,444 — 2,064,052 Securities-based loans 1,755,592 — — — 1,755,592 Commercial real estate 71,517 — — — 71,517 Consumer 42,662 — 4 — 42,666 Home equity lines of credit 13,980 — 323 — 14,303 Construction and land 17,155 — — — 17,155 Total $ 6,185,117 $ 12,751 $ 15,945 $ — $ 6,213,813 As of December 31, 2016 Pass Special Substandard Doubtful Total Residential real estate $ 2,161,223 $ — $ 177 $ — $ 2,161,400 Commercial and industrial 1,652,211 27,905 30,283 — 1,710,399 Securities-based loans 1,614,033 — — — 1,614,033 Commercial real estate 69,189 — 9,522 — 78,711 Consumer 45,385 — 6 — 45,391 Home equity lines of credit 14,595 — 413 — 15,008 Construction and land 12,623 — — — 12,623 Total $ 5,569,259 $ 27,905 $ 40,401 $ — $ 5,637,565

Goodwill And Intangible Assets

Goodwill And Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2017
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, 2016 Adjustments Write-off June 30, 2017 Goodwill Global Wealth Management $ 270,779 $ 6,622 $ — $ 277,401 Institutional Group 691,503 860 — 692,363 $ 962,282 $ 7,482 $ — $ 969,764 December 31, 2016 Net Additions Amortization June 30, 2017 Intangible assets Global Wealth Management $ 45,231 $ 3,800 $ (2,273 ) $ 46,758 Institutional Group 71,073 1,395 (3,973 ) 68,495 $ 116,304 $ 5,195 $ (6,246 ) $ 115,253
Intangible Assets Subject To Amortization	Intangible assets subject to amortization as of June 30, 2017 and December 31, 2016 were as follows (in thousands) June 30, 2017 December 31, 2016 Gross Carrying Value Accumulated Amortization Gross Carrying Value Accumulated Amortization Customer relationships $ 146,687 $ 51,267 $ 141,621 $ 46,209 Trade name 24,713 9,464 24,713 8,670 Investment banking backlog 2,608 1,040 1,345 379 Non-compete agreements 1,445 547 2,578 813 $ 175,453 $ 62,318 $ 170,257 $ 56,071
Amortization Expense In Future Periods	As of June 30, 2017, we expect amortization expense in future periods to be as follows (in thousands) Fiscal year Remainder of 2017 $ 5,780 2018 10,953 2019 10,348 2020 10,128 2021 9,611 Thereafter 66,315 $ 113,135

Senior Notes (Tables)

Senior Notes (Tables)	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Summary of Senior Notes	The following table summarizes our senior notes as of June 30, 2017 and December 31, 2016 (in thousands) June 30, 2017 December 31, 2016 4.250% senior notes, due 2024 (1) $ 500,000 $ 500,000 3.50% senior notes, due 2020 (2) 300,000 300,000 800,000 800,000 Debt issuance costs, net (3,704 ) (4,109 ) $ 796,296 $ 795,891 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.
Schedule Of Corporate Date Maturity	Our senior notes mature as follows, based upon contractual terms (in thousands) 2017 $ — 2018 — 2019 — 2020 300,000 2021 — Thereafter 500,000 $ 800,000

Bank Deposits (Tables)

Bank Deposits (Tables)	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and December 31, 2016 were as follows (in thousands) June 30, 2017 December 31, 2016 Money market and savings accounts $ 11,804,509 $ 11,264,285 Demand deposits (interest-bearing) 235,269 253,545 Demand deposits (non-interest-bearing) 7,851 5,752 Certificates of deposit 2,845 3,901 $ 12,050,474 $ 11,527,483

Derivative Instruments And He42

Derivative Instruments And Hedging Activities (Tables)	6 Months Ended
	Jun. 30, 2017
General Discussion Of Derivative Instruments And Hedging Activities [Abstract]
Schedule Of Notional Values And Fair Values Of Derivative Instruments	The following table provides the notional values and fair values of our derivative instruments as of June 30, 2017 and December 31, 2016 (in thousands) June 30, 2017 Notional Balance Location Fair Value Asset Derivatives Cash flow interest rate contracts $ 790,000 Other assets $ 8,442 Liability Derivatives Cash flow interest rate contracts $ 100,983 Accounts payable and accrued expenses $ 939 December 31, 2016 Notional Value Balance Location Fair Value Asset Derivatives Cash flow interest rate contracts $ 790,000 Other assets $ 10,390 Liability Derivatives Cash flow interest rate contracts $ 121,442 Accounts payable and accrued expenses $ 1,823
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 and six months ended June 30, 2017 and 2016 (in thousands) Three Months Ended June 30, 2017 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Loss Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Gain/(Loss) Recognized Due to Ineffectiveness Cash flow interest rate contracts $ 3,340 Interest expense $ 622 Interest expense $ — Three Months Ended June 30, 2016 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Loss Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Loss Recognized Due to Ineffectiveness Cash flow interest rate contracts $ (7,099 ) Interest $ 1,537 None $ 33 Six Months Ended June 30, 2017 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Loss Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Loss Recognized Due to Ineffectiveness Cash flow interest rate contracts $ 2,576 Interest $ 1,534 None $ — Six Months Ended June 30, 2016 Gain/(Loss) Recognized in OCI (Effectiveness) Location of Loss Reclassified From OCI Into Income Loss Reclassified From OCI Into Income Location of Loss Recognized in OCI (Ineffectiveness) Loss Recognized Due to Ineffectiveness Cash flow interest rate contracts $ (16,525 ) Interest expense $ 2,882 None $ 46

Disclosures About Offsetting 43

Disclosures About Offsetting Assets And Liabilities (Tables)	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 and December 31, 2016 (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 June 30, 2017: Securities borrowing (1) $ 145,285 $ — $ 145,285 $ (99,074 ) $ (34,768 ) $ 11,443 Reverse repurchase agreements (2) 478,091 — 478,091 (205,017 ) (273,074 ) — Cash flow interest rate contracts 8,442 — 8,442 — — 8,442 $ 631,818 $ — $ 631,818 $ (304,091 ) $ (307,842 ) $ 19,885 As of December 31, 2016: Securities borrowing (1) $ 382,691 $ — $ 382,691 $ (291,793 ) $ (68,776 ) $ 22,122 Reverse repurchase agreements (2) 248,588 — 248,588 (216,542 ) (32,046 ) — Cash flow interest rate contracts 10,390 — 10,390 — — 10,390 $ 641,669 $ — $ 641,669 $ (508,335 ) $ (100,822 ) $ 32,512 (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 $474.1 million and $248.5 million at June 30, 2017 and December 31, 2016, respectively.
Financial Liabilities And Derivative Liabilities That Are Subject To Offset	The following table provides information about financial liabilities and derivative liabilities that are subject to offset as of June 30, 2017 and December 31, 2016 (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 June 30, 2017: Securities lending (3) $ (352,127 ) $ — $ (352,127 ) $ 99,074 $ 234,970 $ (18,083 ) Repurchase agreements (4) (243,999 ) — (243,999 ) 205,017 38,982 — Cash flow interest rate contracts (939 ) — (939 ) — 939 — $ (597,065 ) $ — $ (597,065 ) $ 304,091 $ 274,891 $ (18,083 ) As of December 31, 2016: Securities lending (3) $ (478,814 ) $ — $ (478,814 ) $ 291,793 $ 175,849 $ (11,172 ) Repurchase agreements (4) (268,546 ) — (268,546 ) 216,542 52,004 — Cash flow interest rate contracts (1,823 ) — (1,823 ) — 1,823 — $ (749,183 ) $ — $ (749,183 ) $ 508,335 $ 229,676 $ (11,172 ) (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 counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $263.8 million and $299.3 million at June 30, 2017 and December 31, 2016, respectively.

Regulatory Capital Requiremen44

Regulatory Capital Requirements (Tables)	6 Months Ended
	Jun. 30, 2017
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 June 30, 2017 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 $ 1,679,604 18.2 % $ 414,618 4.5 % $ 598,893 6.5 % Tier 1 capital 1,889,208 20.5 % 552,824 6.0 % 737,099 8.0 % Total capital 1,943,420 21.1 % 737,099 8.0 % 921,374 10.0 % Tier 1 leverage 1,889,208 10.3 % 734,557 4.0 % 918,196 5.0 % Stifel Bank – Federal Reserve Capital Amounts June 30, 2017 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 $ 972,080 14.9 % $ 294,562 4.5 % $ 425,479 6.5 % Tier 1 capital 972,080 14.9 % 392,750 6.0 % 523,667 8.0 % Total capital 1,028,447 15.7 % 523,667 8.0 % 654,583 10.0 % Tier 1 leverage 972,080 7.2 % 540,643 4.0 % 675,804 5.0 %

Interest Income And Interest 45

Interest Income And Interest Expense (Tables)	6 Months Ended
	Jun. 30, 2017
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 June 30, Six Months Ended June 30, 2017 2016 2017 2016 Interest income: Bank loans, net $ 48,729 $ 29,475 $ 93,489 $ 56,033 Investment securities 46,385 24,446 88,051 46,807 Margin balances 9,022 8,151 17,205 16,697 Inventory 4,346 4,519 8,582 9,017 Other 469 (811 ) 2,577 53 $ 108,951 $ 65,780 $ 209,904 $ 128,607 Interest expense: Senior notes $ 8,140 $ 8,179 $ 16,280 $ 16,354 Bank deposits 1,887 1,842 3,654 3,743 Federal Home Loan Bank advances 2,797 2,635 4,516 3,392 Other 3,820 4,606 8,090 7,884 $ 16,644 $ 17,262 $ 32,540 $ 31,373

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2017
Segment Reporting [Abstract]
Schedule Of Operating Information, Segment	Information concerning operations in these segments of business for the three and six months ended June 30, 2017 and 2016 is as follows (in thousands) Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Net revenues: (1) Global Wealth Management $ 451,990 $ 386,039 $ 894,722 $ 765,843 Institutional Group 276,153 260,920 513,620 502,196 Other (2,496 ) 5,186 (7,164 ) 4,080 $ 725,647 $ 652,145 $ 1,401,178 $ 1,272,119 Income/(loss) before income taxes: Global Wealth Management $ 153,237 $ 105,053 $ 295,289 $ 198,387 Institutional Group 52,892 42,414 92,764 71,705 Other (122,931 ) (131,674 ) (225,836 ) (210,386 ) $ 83,198 $ 15,793 $ 162,217 $ 59,706 (1) No individual client accounted for more than 10 percent of total net revenues for the three and six months ended June 30, 2017 or 2016.
Schedule Of Information Of Total Assets On Segment Basis	The following table presents our company’s total assets on a segment basis at June 30, 2017 and December 31, 2016 (in thousands) June 30, 2017 December 31, 2016 Global Wealth Management $ 16,692,046 $ 16,065,503 Institutional Group 2,464,369 2,657,183 Other 377,160 406,670 $ 19,533,575 $ 19,129,356
Schedule Of Net Revenues Earned On Major Geographical Areas	Revenues, classified by the major geographic areas in which they are earned for the three and six months ended June 30, 2017 and 2016, were as follows (in thousands) Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 United States $ 690,930 $ 611,984 $ 1,339,261 $ 1,193,721 United Kingdom 32,771 37,844 57,290 73,592 Other European 1,946 2,317 4,627 4,806 $ 725,647 $ 652,145 $ 1,401,178 $ 1,272,119

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Computation Of Basic And Diluted Earnings Per Share	The following table sets forth the computation of basic and diluted earnings per share for the three and six months ended June 30, 2017 and 2016 (in thousands, except per share data) Three Months Ended June 30, Six Months Ended June 30, 2017 2016 2017 2016 Net income $ 52,811 $ 9,771 $ 118,323 $ 36,826 Preferred dividends 2,344 — 4,688 — Net income available to common shareholders $ 50,467 $ 9,771 $ 113,635 $ 36,826 Shares for basic and diluted calculation: Average shares used in basic computation 68,556 66,792 68,471 67,186 Dilutive effect of stock options and units (1) 11,465 9,190 11,920 8,898 Average shares used in diluted computation 80,021 75,982 80,391 76,084 Earnings per common share: Basic $ 0.74 $ 0.15 $ 1.66 $ 0.55 Diluted $ 0.63 $ 0.13 $ 1.41 $ 0.48 (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.

New Accounting Pronouncements (

New Accounting Pronouncements (Narrative) (Details) - ASU No. 2016-09 [Member] $ in Millions	6 Months Ended
	Jun. 30, 2017USD ($)
Reclassification from Operating Activities to Financing Activities [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Shares withheld from employee awards for tax withholding purposes	$ 38.1
Incentive Stock Award Plans [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Provision for income tax expense (benefit)	$ (17.1)

Receivables From And Payables49

Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Amounts Receivable From Brokers, Dealers, And Clearing Organizations) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Receivables from clearing organizations	$ 153,241	$ 568,373
Deposits paid for securities borrowed	145,285	382,691
Securities failed to deliver	60,234	73,688
Receivables from brokers, dealers and clearing organizations, Total	$ 358,760	$ 1,024,752

Receivables From And Payables50

Receivables From And Payables To Brokers, Dealers And Clearing Organizations (Amounts Payable To Brokers, Dealers, And Clearing Organizations) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Due To And From Broker Dealers And Clearing Organizations [Abstract]
Deposits received from securities loaned	$ 352,127	$ 478,814
Securities failed to receive	50,315	27,882
Payable to clearing organizations	30,901	16,411
Payables to broker, dealers and clearing organizations, Total	$ 433,343	$ 523,107

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	Jun. 30, 2017	Dec. 31, 2016
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	$ 43,285	$ 90,809
Unfunded commitments	3,204	12,368
Private Company Investments [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments		18,763
Unfunded commitments		8,526
Partnership Interests [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	5,806	15,798
Unfunded commitments	1,348	1,822
Mutual Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	12,441	11,301
Private Equity Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	8,673	9,310
Unfunded commitments	1,856	2,020
Money Market Funds [Member]
Fair Value Investments Entities That Calculate Net Asset Value Per Share [Line Items]
Fair value of investments	$ 16,365	$ 35,637

Fair Value Of Financial Instr52

Fair Value Of Financial Instruments (Fair Value Of Assets And Liabilities Measured On Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	$ 1,063,651	$ 925,045
Available-for-sale securities	3,455,373	3,181,313
Investments	128,332	133,563
Cash equivalents measured at NAV	16,365	35,637
Derivative contracts, Assets	8,442	10,390
Total Assets	4,672,163	4,285,948
Financial instruments sold, but not yet purchased, at fair value	705,577	699,032
Derivative contracts, Liabilities	939	1,823
Total Liabilities	706,516	700,855
U.S. Government Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	119,703	89,833
Available-for-sale securities	4,565	4,197
Financial instruments sold, but not yet purchased, at fair value	1,995	20,549
Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	367,866	299,946
Available-for-sale securities	971,131	823,511
Financial instruments sold, but not yet purchased, at fair value	245,148	202,968
Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	43,671	32,044
Investments	50,384	27,247
Financial instruments sold, but not yet purchased, at fair value	41,091	18,395
State And Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	147,458	159,095
Available-for-sale securities	72,382	72,490
Financial instruments sold, but not yet purchased, at fair value	37	31
Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,013,928	1,867,718
Auction Rate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	48,577	48,689
Auction Rate Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	841	832
Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	1,610	1,623
Investments In Funds Measured At NAV [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	26,920	55,172
U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	16,924	9,951
Financial instruments sold, but not yet purchased, at fair value	298,832	362,536
Mortgage Backed Securities [Member] | Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	313,463	305,774
Available-for-sale securities	319,062	338,732
Financial instruments sold, but not yet purchased, at fair value	118,458	94,552
Mortgage Backed Securities [Member] | Non-Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	54,566	28,402
Available-for-sale securities	1,617	1,892
Financial instruments sold, but not yet purchased, at fair value	16	1
Mortgage Backed Securities [Member] | Commercial [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	72,688	72,773
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	67,671	43,339
Available-for-sale securities	199	300
Investments	50,144	23,414
Total Assets	118,014	67,053
Financial instruments sold, but not yet purchased, at fair value	340,240	381,911
Total Liabilities	340,240	381,911
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	199	300
Level 1 [Member] | Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	7,443	1,944
Financial instruments sold, but not yet purchased, at fair value	317	980
Level 1 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	43,304	31,444
Investments	50,144	23,414
Financial instruments sold, but not yet purchased, at fair value	41,091	18,395
Level 1 [Member] | U.S. Government Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	16,924	9,951
Financial instruments sold, but not yet purchased, at fair value	298,832	362,536
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	994,832	879,751
Available-for-sale securities	3,455,174	3,181,013
Investments	14,326	383
Derivative contracts, Assets	8,442	10,390
Total Assets	4,472,774	4,071,537
Financial instruments sold, but not yet purchased, at fair value	365,337	317,121
Derivative contracts, Liabilities	939	1,823
Total Liabilities	366,276	318,944
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	119,703	89,833
Available-for-sale securities	4,366	3,897
Financial instruments sold, but not yet purchased, at fair value	1,995	20,549
Level 2 [Member] | Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	360,167	297,729
Available-for-sale securities	971,131	823,511
Financial instruments sold, but not yet purchased, at fair value	244,831	201,988
Level 2 [Member] | State And Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	147,458	159,095
Available-for-sale securities	72,382	72,490
Financial instruments sold, but not yet purchased, at fair value	37	31
Level 2 [Member] | Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	2,013,928	1,867,718
Level 2 [Member] | Auction Rate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	13,956
Level 2 [Member] | Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	370	383
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	313,463	305,774
Available-for-sale securities	319,062	338,732
Financial instruments sold, but not yet purchased, at fair value	118,458	94,552
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	54,041	27,320
Available-for-sale securities	1,617	1,892
Financial instruments sold, but not yet purchased, at fair value	16	1
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	72,688	72,773
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	1,148	1,955
Investments	36,942	54,594
Total Assets	38,090	56,549
Level 3 [Member] | Corporate Fixed Income Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	256	273
Level 3 [Member] | Corporate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments owned	367	600
Investments	240	3,833
Level 3 [Member] | Auction Rate Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	34,621	48,689
Level 3 [Member] | Auction Rate Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	841	832
Level 3 [Member] | Other Investment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	1,240	1,240
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	$ 525	$ 1,082

Fair Value Of Financial Instr53

Fair Value Of Financial Instruments (Schedule Of Changes In Fair Value Associated With Level 3 Financial Instruments) (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers, Into Level 3		$ 0
Transfers, Out of Level 3	$ (18,300,000)	(18,300,000)
Non-Agency [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	1,019,000	1,082,000
Unrealized gains/(losses), Included in changes in net assets	(100,000)	(100,000)
Realized gains/(losses)	96,000	97,000
Sales	(324,000)	(324,000)
Redemptions	(166,000)	(230,000)
Net change	(494,000)	(557,000)
Ending Balance	525,000	525,000
Fixed Income Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	267,000	273,000
Redemptions	(11,000)	(17,000)
Net change	(11,000)	(17,000)
Ending Balance	256,000	256,000
Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	583,000	600,000
Unrealized gains/(losses), Included in changes in net assets	(216,000)	(233,000)
Net change	(216,000)	(233,000)
Ending Balance	367,000	367,000
Corporate Equity Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	3,833,000	3,833,000
Transfers, Out of Level 3	(3,593,000)	(3,593,000)
Net change	(3,593,000)	(3,593,000)
Ending Balance	240,000	240,000
Equity Auction Rate Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	49,055,000	48,689,000
Unrealized gains/(losses), Included in changes in net assets	251,000	617,000
Transfers, Out of Level 3	(14,685,000)	(14,685,000)
Net change	(14,434,000)	(14,068,000)
Ending Balance	34,621,000	34,621,000
Auction Rate Municipal Securities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	837,000	832,000
Unrealized gains/(losses), Included in changes in net assets	4,000	9,000
Net change	4,000	9,000
Ending Balance	841,000	841,000
Other Investment [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	1,240,000	1,240,000
Ending Balance	$ 1,240,000	$ 1,240,000

Fair Value Of Financial Instr54

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]	6 Months Ended
	Jun. 30, 2017
Auction Rate Equity Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Workout period range, low end	1 year
Workout period range, high end	3 years
Discount rate, weighted average	5.20%
Weighted average workout period	2 years 2 months 12 days
Auction Rate Equity Securities [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate range	1.20%
Auction Rate Equity Securities [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate range	10.50%
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	3.90%
Weighted average workout period	1 year 10 months 24 days
Auction Rate Municipal Securities [Member] | Minimum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate range	1.60%
Auction Rate Municipal Securities [Member] | Maximum [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Discount rate range	9.40%

Fair Value Of Financial Instr55

Fair Value Of Financial Instruments (Narrative) (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2017USD ($)	Jun. 30, 2017USD ($)
Fair Value Disclosures [Abstract]
Transfers of financial assets from Level 2 to Level 1	$ 1,000,000	$ 1,100,000
Transfers of financial assets from Level 1 to Level 2	4,000,000	4,400,000
Transfers, Into Level 3		0
Transfers, out of Level 3, assets	$ 18,300,000	$ 18,300,000
Stated interest rate	4.25%	4.25%
Maturity date		Dec. 31, 2024

Fair Value Of Financial Instr56

Fair Value Of Financial Instruments (Schedule Of Fair Value Of Financial Instruments) (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Securities purchased under agreements to resell	[1]	$ 478,091	$ 248,588
Financial instruments owned		1,063,651	925,045
Available-for-sale securities		3,455,373	3,181,313
Held-to-maturity securities	[2]	3,321,880	3,040,554
Investments, at fair value		128,332	133,563
Derivative contracts		8,442	10,390
Securities sold under agreements to repurchase	[3]	243,999	268,546
Bank deposits		12,050,474	11,527,483
Financial instruments sold, but not yet purchased, at fair value		705,577	699,032
Derivative contracts		939	1,823
Borrowings		105,000	377,000
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		678,054	912,932
Cash segregated for regulatory purposes		150	73,235
Securities purchased under agreements to resell		478,091	248,588
Financial instruments owned		1,063,651	925,045
Available-for-sale securities		3,455,373	3,181,313
Held-to-maturity securities		3,307,970	3,038,405
Loans held for sale		139,676	228,588
Bank loans		6,160,093	5,591,190
Investments, at fair value		128,332	133,563
Derivative contracts		8,442	10,390
Securities sold under agreements to repurchase		243,999	268,546
Bank deposits		12,050,474	11,527,483
Financial instruments sold, but not yet purchased, at fair value		705,577	699,032
Derivative contracts		939	1,823
Federal Home Loan Bank advances		790,000	500,000
Borrowings		105,000	377,000
Senior notes		796,296	795,891
Debentures to Stifel Financial Capital Trusts		67,500	67,500
Estimated Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		678,054	912,932
Cash segregated for regulatory purposes		150	73,235
Securities purchased under agreements to resell		478,091	248,588
Financial instruments owned		1,063,651	925,045
Available-for-sale securities		3,455,373	3,181,313
Held-to-maturity securities		3,321,880	3,040,554
Loans held for sale		139,676	228,588
Bank loans		5,994,527	5,633,804
Investments, at fair value		128,332	133,563
Derivative contracts		8,442	10,390
Securities sold under agreements to repurchase		243,999	268,546
Bank deposits		11,366,970	11,092,185
Financial instruments sold, but not yet purchased, at fair value		705,577	699,032
Derivative contracts		939	1,823
Federal Home Loan Bank advances		790,000	500,000
Borrowings		105,000	377,000
Senior notes		811,318	799,632
Debentures to Stifel Financial Capital Trusts		$ 50,413	$ 52,525
[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 $474.1 million and $248.5 million at June 30, 2017 and December 31, 2016, 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 counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $263.8 million and $299.3 million at June 30, 2017 and December 31, 2016, respectively.

Fair Value Of Financial Instr57

Fair Value Of Financial Instruments (Estimated Fair Values Of Financial Instruments Not Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities purchased under agreements to resell	[1]	$ 478,091	$ 248,588
Held-to-maturity securities	[2]	3,321,880	3,040,554
Securities sold under agreements to repurchase	[3]	243,999	268,546
Bank deposits		12,050,474	11,527,483
Borrowings		105,000	377,000
Senior notes		796,296	795,891
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash		661,689	877,295
Cash segregated for regulatory purposes		150	73,235
Securities purchased under agreements to resell		478,091	248,588
Held-to-maturity securities		3,321,880	3,040,554
Loans held for sale		139,676	228,588
Bank loans		5,994,527	5,633,804
Securities sold under agreements to repurchase		243,999	268,546
Bank deposits		11,366,970	11,092,185
Federal Home Loan Bank advances		790,000	500,000
Borrowings		105,000	377,000
Senior notes		811,318	799,632
Debentures to Stifel Financial Capital Trusts		50,413	52,525
Fair Value, Measurements, Nonrecurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash		661,689	877,295
Cash segregated for regulatory purposes		150	73,235
Securities purchased under agreements to resell		478,091	227,983
Securities sold under agreements to repurchase			149,881
Federal Home Loan Bank advances		790,000	500,000
Borrowings		105,000	377,000
Senior notes		811,318	799,632
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			20,605
Held-to-maturity securities		3,119,542	2,830,869
Loans held for sale		139,676	228,588
Bank loans		5,994,527	5,633,804
Securities sold under agreements to repurchase		243,999	118,665
Bank deposits		11,366,970	11,092,185
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		202,338	209,685
Debentures to Stifel Financial Capital Trusts		$ 50,413	$ 52,525
[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 $474.1 million and $248.5 million at June 30, 2017 and December 31, 2016, 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 counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $263.8 million and $299.3 million at June 30, 2017 and December 31, 2016, respectively.

Financial Instruments Owned A58

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	Jun. 30, 2017	Dec. 31, 2016
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	$ 1,063,651	$ 925,045
U.S. Government Agency Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	119,703	89,833
Corporate Fixed Income Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	367,866	299,946
Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	43,671	32,044
State and Municipal Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	147,458	159,095
U.S. Government Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	16,924	9,951
Mortgage Backed Securities [Member] | Non-Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	54,566	28,402
Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	313,463	305,774
Securities Sold, But Not yet Purchased [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	705,577	699,032
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	1,995	20,549
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	245,148	202,968
Securities Sold, But Not yet Purchased [Member] | Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Equity securities	41,091	18,395
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	37	31
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	298,832	362,536
Securities Sold, But Not yet Purchased [Member] | Mortgage Backed Securities [Member] | Non-Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	16	1
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	118,458	94,552
Securities Owned
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments owned, at fair value	1,063,651	925,045
Securities Owned | U.S. Government Agency Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	119,703	89,833
Securities Owned | Corporate Fixed Income Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Fixed income securities	367,866	299,946
Securities Owned | Corporate Equity Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Equity securities	43,671	32,044
Securities Owned | State and Municipal Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
State and municipal securities	147,458	159,095
Securities Owned | U.S. Government Securities [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	16,924	9,951
Securities Owned | Mortgage Backed Securities [Member] | Non-Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	54,566	28,402
Securities Owned | Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Trading securities owned	$ 313,463	$ 305,774

Financial Instruments Owned A59

Financial Instruments Owned And Financial Instruments Sold, But Not Yet Purchased (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments pledged as collateral	$ 1,900	$ 2,000
Financial instruments owned		1,300
Securities Owned
Schedule Of Trading Securities And Other Trading Assets [Line Items]
Financial instruments pledged as collateral	$ 591.6	$ 992.9

Available-For-Sale And Held-T60

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		Jun. 30, 2017	Dec. 31, 2016
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		$ 3,451,901	$ 3,190,090
Available for sale securities, unrealized gains	[1]	16,385	11,634
Available-for-sale Securities, Gross unrealized losses	[1]	(12,913)	(20,411)
Available-for-sale securities		3,455,373	3,181,313
Held-to-maturity Securities, Amortized cost	[2]	3,307,970	3,038,405
Held-to-maturity Securities, Gross unrealized gains	[2]	30,447	22,595
Held-to-maturity Securities, Gross unrealized losses	[2]	(16,537)	(20,446)
Held-to-maturity securities, Estimated fair value	[2]	3,321,880	3,040,554
U.S. Government Agency Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		4,584	4,213
Available for sale securities, unrealized gains	[1]		2
Available-for-sale Securities, Gross unrealized losses	[1]	(19)	(18)
Available-for-sale securities		4,565	4,197
State And Municipal Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		75,685	76,066
Available for sale securities, unrealized gains	[1]	2
Available-for-sale Securities, Gross unrealized losses	[1]	(3,305)	(3,576)
Available-for-sale securities		72,382	72,490
Corporate Fixed Income Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		971,867	830,695
Available for sale securities, unrealized gains	[1]	2,843	1,418
Available-for-sale Securities, Gross unrealized losses	[1]	(3,579)	(8,602)
Available-for-sale securities		971,131	823,511
Held-to-maturity Securities, Amortized cost	[2]	40,045	40,078
Held-to-maturity Securities, Gross unrealized gains	[2]	69	30
Held-to-maturity securities, Estimated fair value	[2]	40,114	40,108
Asset-Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		2,000,561	1,858,929
Available for sale securities, unrealized gains	[1]	13,367	9,857
Available-for-sale Securities, Gross unrealized losses	[1]		(1,068)
Available-for-sale securities		2,013,928	1,867,718
Held-to-maturity Securities, Amortized cost	[2]	1,754,093	1,370,300
Held-to-maturity Securities, Gross unrealized gains	[2]	11,405	6,242
Held-to-maturity Securities, Gross unrealized losses	[2]	(2,063)	(3,396)
Held-to-maturity securities, Estimated fair value	[2]	1,763,435	1,373,146
Mortgage Backed Securities [Member] | Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		321,352	340,738
Available for sale securities, unrealized gains	[1]	131	298
Available-for-sale Securities, Gross unrealized losses	[1]	(2,421)	(2,304)
Available-for-sale securities		319,062	338,732
Held-to-maturity Securities, Amortized cost	[2]	1,454,314	1,567,758
Held-to-maturity Securities, Gross unrealized gains	[2]	16,885	14,537
Held-to-maturity Securities, Gross unrealized losses	[2]	(14,474)	(17,037)
Held-to-maturity securities, Estimated fair value	[2]	1,456,725	1,565,258
Mortgage Backed Securities [Member] | Commercial [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Amortized cost		76,131	77,417
Available for sale securities, unrealized gains	[1]	42	59
Available-for-sale Securities, Gross unrealized losses	[1]	(3,485)	(4,703)
Available-for-sale securities		72,688	72,773
Held-to-maturity Securities, Amortized cost	[2]	59,518	59,581
Held-to-maturity Securities, Gross unrealized gains	[2]	2,088	1,786
Held-to-maturity securities, Estimated fair value	[2]	61,606	61,367
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		1,721	2,032
Available-for-sale Securities, Gross unrealized losses	[1]	(104)	(140)
Available-for-sale securities		$ 1,617	1,892
Held-to-maturity Securities, Amortized cost	[2]		688
Held-to-maturity Securities, Gross unrealized losses	[2]		(13)
Held-to-maturity securities, Estimated fair value	[2]		$ 675
[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-T61

Available-For-Sale And Held-To-Maturity Securities (Narrative) (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017USD ($)security	Jun. 30, 2016USD ($)	Jun. 30, 2017USD ($)security	Jun. 30, 2016USD ($)	Dec. 31, 2016USD ($)
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Proceeds from sale of available-for-sale securities		$ 87,300	$ 0	$ 87,300	$ 0
Net realized gains resulting from sale of available-for-sale securities		400		400
Unrealized gains (losses) recorded in accumulated other comprehensive loss	[1],[2]	3,770	11,449	7,547	10,421
Financial instruments pledged as collateral		1,900,000		1,900,000		$ 2,000,000
Trading securities pledged		$ 1,900,000		$ 1,900,000		1,700,000
Number of available for sale securities whose amortized costs exceeded their fair values | security		124		124
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses				$ 12,913
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses				4,965
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		$ 832,228		$ 832,228
Percentage of available-for-sale portfolio		24.10%		24.10%
Held-to-maturity, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions | security		45		45
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss				$ 16,537
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss				1,768
Credit-related OTTI		$ 0	$ 0	0	$ 0
Gross unrealized losses related to investment portfolio	[3]	12,913		12,913		$ 20,411
Available-for-sale and Held-to-maturity Securities [Member]
Other Than Temporary Impairment Credit Losses Recognized In Earnings [Line Items]
Gross unrealized losses related to investment portfolio		$ 29,500		$ 29,500
[1]	Net of tax expense of $3.7 million and $2.3 million for the three months ended June 30, 2017 and 2016, respectively. Net of tax expense of $8.5 million and tax benefit of $2.5 million for the six months ended June 30, 2017 and 2016, respectively.
[2]	There were no reclassifications to earnings during the three and six months ended June 30, 2017 and 2016, respectively.
[3]	Unrealized gains/(losses) related to available-for-sale securities are reported in accumulated other comprehensive loss.

Available-For-Sale And Held-T62

Available-For-Sale And Held-To-Maturity Securities (Schedule Of Amortized Cost And Fair Values Of Debt Securities By Contractual Maturity) (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Schedule Of Debt Securities At Amortized Cost And Fair Value Basis [Line Items]
Available-for-sale Securities, debt maturities, Amortized Cost		$ 3,451,901
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	142,514
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	759,825
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	1,981,696
Available-for-sale Securities, debt maturities, Fair Value	[1]	3,455,373
Held-to-maturity Securities, debt maturities, within one year, Amortized Cost		40,045
Held-to-maturity Securities, debt maturities, after five through ten years, Amortized Cost		497,440
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		2,710,967
Held-to-maturity Securities, Amortized cost	[2]	3,307,970	$ 3,038,405
Held-to-maturity Securities, debt maturities, Fair Value	[2]	3,321,880	$ 3,040,554
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		142,136
Available-for-sale Securities, debt maturities, after one year through three years, Amortized Cost		138,597
Available-for-sale Securities, debt maturities, after three year through five years, Amortized Cost		432,593
Available-for-sale Securities, debt maturities, after five through ten years, Amortized Cost		702,630
Availably-for-sale Securities, debt maturities, after ten years, Amortized Cost		1,636,741
Available-for-sale Securities, debt maturities, within one year, Fair Value		142,514
Available-for-sale Securities, debt maturities, after one year through three years, Fair Value		139,032
Available-for-sale Securities, debt maturities, after three year through five years, Fair Value		432,306
Available-for-sale Securities, debt maturities, after five through ten years, fair value		703,979
Availably-for-sale Securities, debt maturities, after ten years, Fair Value		1,644,175
Held-to-maturity Securities, debt maturities, within one year, Amortized Cost		40,045
Held-to-maturity Securities, debt maturities, after five through ten years, Amortized Cost		335,011
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		1,419,082
Held-to-maturity Securities, debt maturities, within one year, Fair Value		40,114
Held-to-maturity Securities, debt maturities, after five through ten years, Fair Value		335,513
Held-to-maturity Securities, debt maturities, after ten years, Fair Value		1,427,922
Mortgage Backed Securities [Member]
Schedule Of Debt Securities At Amortized Cost And Fair Value Basis [Line Items]
Available-for-sale Securities, debt maturities, after five through ten years, Amortized Cost		58,618
Availably-for-sale Securities, debt maturities, after ten years, Amortized Cost		340,586
Available-for-sale Securities, debt maturities, after five through ten years, fair value		55,846
Availably-for-sale Securities, debt maturities, after ten years, Fair Value		337,521
Held-to-maturity Securities, debt maturities, after three year through five years, Amortized Cost		59,518
Held-to-maturity Securities, debt maturities, after five through ten years, Amortized Cost		162,429
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		1,291,885
Held-to-maturity Securities, debt maturities, after three year through five years, Fair Value		61,606
Held-to-maturity Securities, debt maturities, after five through ten years, Fair Value		161,038
Held-to-maturity Securities, debt maturities, after ten years, Fair Value		$ 1,295,687
[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-T63

Available-For-Sale And Held-To-Maturity Securities (Contractual Maturities) (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, within one year, Fair Value	[1]	$ 142,514
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	571,338
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	759,825
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	1,981,696
Available-for-sale Securities, debt maturities, Fair Value	[1]	3,455,373
Held-to-maturity Securities, debt maturities, within one year, Amortized Cost		40,045
Held-to-maturity Securities, debt maturities, after one year through five, Amortized Cost		59,518
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		497,440
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		2,710,967
Held-to-maturity Securities, Amortized cost	[2]	3,307,970	$ 3,038,405
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]	824
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	3,741
Available-for-sale Securities, debt maturities, Fair Value	[1]	4,565
State And Municipal 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]	200
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	375
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	16,738
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	55,069
Available-for-sale Securities, debt maturities, Fair Value	[1]	72,382
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]	141,490
Available-for-sale Securities, debt maturities, after one year through five, Fair Value	[1]	567,222
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	262,419
Available-for-sale Securities, debt maturities, Fair Value	[1]	971,131
Held-to-maturity Securities, debt maturities, within one year, Amortized Cost		40,045
Held-to-maturity Securities, Amortized cost	[2]	40,045	40,078
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]	424,822
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	1,589,106
Available-for-sale Securities, debt maturities, Fair Value	[1]	2,013,928
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		335,011
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		1,419,082
Held-to-maturity Securities, Amortized cost	[2]	1,754,093	1,370,300
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		55,846
Availably-for-sale Securities, debt maturities, after ten years, Fair Value		337,521
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		162,429
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		1,291,885
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 five through ten years, fair value	[1]	412
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	318,650
Available-for-sale Securities, debt maturities, Fair Value	[1]	319,062
Held-to-maturity Securities, debt maturities, after five year through ten, Amortized Cost		162,429
Held-to-maturity Securities, debt maturities, after ten years, Amortized Cost		1,291,885
Held-to-maturity Securities, Amortized cost	[2]	1,454,314	1,567,758
Mortgage Backed Securities [Member] | Commercial [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, debt maturities, after five through ten years, fair value	[1]	55,434
Availably-for-sale Securities, debt maturities, after ten years, Fair Value	[1]	17,254
Available-for-sale Securities, debt maturities, Fair Value	[1]	72,688
Held-to-maturity Securities, debt maturities, after one year through five, Amortized Cost		59,518
Held-to-maturity Securities, Amortized cost	[2]	59,518	59,581
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]	1,617
Available-for-sale Securities, debt maturities, Fair Value	[1]	$ 1,617
Held-to-maturity Securities, Amortized cost	[2]		$ 688
[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-T64

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	6 Months Ended
	Jun. 30, 2017USD ($)
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	$ (7,948)
Available-for-sale Securities, Estimated fair value, Less than 12 months	636,866
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(4,965)
Available-for-sale Securities, Estimated fair value, 12 months or more	195,362
Available-for-sale Securities, Gross unrealized losses, Total	(12,913)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	832,228
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(14,769)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	947,884
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(1,768)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	35,556
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(16,537)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	983,440
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	(19)
Available-for-sale Securities, Estimated fair value, Less than 12 months	4,565
Available-for-sale Securities, Gross unrealized losses, Total	(19)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	4,565
State And Municipal 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	(261)
Available-for-sale Securities, Estimated fair value, Less than 12 months	9,765
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(3,044)
Available-for-sale Securities, Estimated fair value, 12 months or more	60,113
Available-for-sale Securities, Gross unrealized losses, Total	(3,305)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	69,878
Corporate Fixed Income Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, Less than 12 months	(3,579)
Available-for-sale Securities, Estimated fair value, Less than 12 months	396,324
Available-for-sale Securities, Gross unrealized losses, Total	(3,579)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	396,324
Asset-Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(312)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	116,997
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(1,751)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	34,391
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(2,063)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	151,388
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	(604)
Available-for-sale Securities, Estimated fair value, Less than 12 months	155,073
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(1,817)
Available-for-sale Securities, Estimated fair value, 12 months or more	133,664
Available-for-sale Securities, Gross unrealized losses, Total	(2,421)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	288,737
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(14,457)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	830,887
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss	(17)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,165
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss, Total	(14,474)
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value, Total	832,052
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, Less than 12 months	(3,485)
Available-for-sale Securities, Estimated fair value, Less than 12 months	71,139
Available-for-sale Securities, Gross unrealized losses, Total	(3,485)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	71,139
Mortgage Backed Securities [Member] | Non-Agency [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available-for-sale Securities, Gross unrealized losses, 12 months or more	(104)
Available-for-sale Securities, Estimated fair value, 12 months or more	1,585
Available-for-sale Securities, Gross unrealized losses, Total	(104)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value, Total	$ 1,585

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	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 6,213,813		$ 5,637,565
Unamortized loan premium/(discount), net	1,113		858
Unamortized loan fees, net of loan fees	75		(49)
Loans in process	(706)		(2,021)
Allowance for loan losses	(54,202)	$ (51,298)	(45,163)	$ (35,866)	$ (34,050)	$ (29,787)
Bank loans, net	$ 6,160,093		$ 5,591,190
Gross bank loans, Percent	100.00%		100.00%
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 2,248,528		$ 2,161,400
Allowance for loan losses	$ (5,569)	(4,190)	$ (2,660)	(1,529)	(1,330)	(1,241)
Gross bank loans, Percent	36.20%		38.40%
Commercial And Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 2,064,052		$ 1,710,399
Allowance for loan losses	$ (40,805)	(38,789)	$ (35,127)	(29,816)	(27,700)	(24,748)
Gross bank loans, Percent	33.20%		30.30%
Securities-Based Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 1,755,592		$ 1,614,033
Allowance for loan losses	$ (3,600)	(3,393)	$ (3,094)	(1,731)	(1,605)	(1,607)
Gross bank loans, Percent	28.30%		28.60%
Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 42,666		$ 45,391
Allowance for loan losses	$ (105)	(107)	$ (129)	(107)	(84)	(105)
Gross bank loans, Percent	0.70%		0.80%
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 71,517		$ 78,711
Allowance for loan losses	$ (932)	(1,618)	$ (1,363)	(512)	(1,289)	(264)
Gross bank loans, Percent	1.20%		1.40%
Home Equity Lines Of Credit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 14,303		$ 15,008
Allowance for loan losses	$ (283)	(285)	$ (371)	(283)	(267)	(290)
Gross bank loans, Percent	0.20%		0.30%
Construction And Land [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross bank loans	$ 17,155		$ 12,623
Allowance for loan losses	$ (224)	$ (437)	$ (232)	$ (144)	$ (118)	$ (78)
Gross bank loans, Percent	0.20%		0.20%

Bank Loans (Narrative) (Details

Bank Loans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale, at lower of cost or market	$ 139,676		$ 139,676		$ 228,588
Gains (losses) recognized from sale of loans	3,400	$ 4,100	6,200	$ 6,900
Impaired loans more than 90 days past due	14,400		14,400		26,900
Troubled debt restructurings	9,200		9,200		9,700
Specific allowance	$ 2,332		$ 2,332		$ 3,375
Collateralized loan portfolio	98.20%		98.20%		97.90%
Stifel Financial Corp. [Member] | Executive Officers Directors and Their Affiliates [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans outstanding amount	$ 7,000		$ 7,000		$ 5,600
Stifel Bank [Member] | Executive Officers Directors and Their Affiliates [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans outstanding amount	$ 3,900		$ 3,900		$ 3,700

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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	$ 51,298	$ 34,050	$ 45,163	$ 29,787
Provision	5,856	1,824	11,991	6,082
Charge-offs	(2,953)	(13)	(2,953)	(13)
Recoveries	1	5	1	10
Ending Balance	54,202	35,866	54,202	35,866
Commercial And Industrial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	38,789	27,700	35,127	24,748
Provision	2,266	2,116	5,928	5,068
Charge-offs	(250)		(250)
Ending Balance	40,805	29,816	40,805	29,816
Securities-Based Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	3,393	1,605	3,094	1,607
Provision	207	126	506	124
Ending Balance	3,600	1,731	3,600	1,731
Consumer [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	107	84	129	105
Provision	(2)	23	(24)	2
Ending Balance	105	107	105	107
Residential Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	4,190	1,330	2,660	1,241
Provision	1,379	210	2,909	298
Charge-offs		(13)		(13)
Recoveries		2		3
Ending Balance	5,569	1,529	5,569	1,529
Commercial Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	1,618	1,289	1,363	264
Provision	2,017	(780)	2,272	241
Charge-offs	(2,703)		(2,703)
Recoveries		3		7
Ending Balance	932	512	932	512
Home Equity Lines Of Credit [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	285	267	371	290
Provision	(3)	16	(89)	(7)
Recoveries	1		1
Ending Balance	283	283	283	283
Construction And Land [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	437	118	232	78
Provision	(213)	26	(8)	66
Ending Balance	224	144	224	144
Qualitative [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning Balance	2,479	1,657	2,187	1,454
Provision	205	87	497	290
Ending Balance	$ 2,684	$ 1,744	$ 2,684	$ 1,744

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	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	$ 2,332		$ 3,375
Allowance for Loan Losses, Collectively Evaluated for Impairment	51,870		41,788
Allowance for Loan Losses, Total	54,202	$ 51,298	45,163	$ 35,866	$ 34,050	$ 29,787
Recorded Investment in Loans, Individually Evaluated for Impairment	14,450		26,934
Recorded Investment in Loans, Collectively Evaluated for Impairment	6,199,363		5,610,631
Recorded Investment in Loans, Total	6,213,813		5,637,565
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	5,545		2,636
Allowance for Loan Losses, Total	5,569	4,190	2,660	1,529	1,330	1,241
Recorded Investment in Loans, Individually Evaluated for Impairment	174		178
Recorded Investment in Loans, Collectively Evaluated for Impairment	2,248,354		2,161,222
Recorded Investment in Loans, Total	2,248,528		2,161,400
Commercial And Industrial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	2,155		2,392
Allowance for Loan Losses, Collectively Evaluated for Impairment	38,650		32,735
Allowance for Loan Losses, Total	40,805	38,789	35,127	29,816	27,700	24,748
Recorded Investment in Loans, Individually Evaluated for Impairment	13,949		16,815
Recorded Investment in Loans, Collectively Evaluated for Impairment	2,050,103		1,693,584
Recorded Investment in Loans, Total	2,064,052		1,710,399
Securities-Based Loans [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	3,600		3,094
Allowance for Loan Losses, Total	3,600	3,393	3,094	1,731	1,605	1,607
Recorded Investment in Loans, Collectively Evaluated for Impairment	1,755,592		1,614,033
Recorded Investment in Loans, Total	1,755,592		1,614,033
Commercial Real Estate [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment			722
Allowance for Loan Losses, Collectively Evaluated for Impairment	932		641
Allowance for Loan Losses, Total	932	1,618	1,363	512	1,289	264
Recorded Investment in Loans, Individually Evaluated for Impairment			9,522
Recorded Investment in Loans, Collectively Evaluated for Impairment	71,517		69,189
Recorded Investment in Loans, Total	71,517		78,711
Consumer [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	4		6
Allowance for Loan Losses, Collectively Evaluated for Impairment	101		123
Allowance for Loan Losses, Total	105	107	129	107	84	105
Recorded Investment in Loans, Individually Evaluated for Impairment	4		6
Recorded Investment in Loans, Collectively Evaluated for Impairment	42,662		45,385
Recorded Investment in Loans, Total	42,666		45,391
Home Equity Lines Of Credit [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	149		231
Allowance for Loan Losses, Collectively Evaluated for Impairment	134		140
Allowance for Loan Losses, Total	283	285	371	283	267	290
Recorded Investment in Loans, Individually Evaluated for Impairment	323		413
Recorded Investment in Loans, Collectively Evaluated for Impairment	13,980		14,595
Recorded Investment in Loans, Total	14,303		15,008
Construction And Land [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	224		232
Allowance for Loan Losses, Total	224	437	232	144	118	78
Recorded Investment in Loans, Collectively Evaluated for Impairment	17,155		12,623
Recorded Investment in Loans, Total	17,155		12,623
Qualitative [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for Loan Losses, Collectively Evaluated for Impairment	2,684		2,187
Allowance for Loan Losses, Total	$ 2,684	$ 2,479	$ 2,187	$ 1,744	$ 1,657	$ 1,454

Bank Loans (Loans That Were Ind

Bank Loans (Loans That Were Individually Evaluated For Impairment By Portfolio Segment) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	$ 15,125	$ 28,742
Recorded Investment with Allowance	14,450	26,934
Total Recorded Investment	14,450	26,934
Related Allowance	2,332	3,375
Average Recorded Investment	17,427	32,242
Commercial And Industrial [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	13,949	16,815
Recorded Investment with Allowance	13,949	16,815
Total Recorded Investment	13,949	16,815
Related Allowance	2,155	2,392
Average Recorded Investment	16,921	22,559
Consumer [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	679	833
Recorded Investment with Allowance	4	6
Total Recorded Investment	4	6
Related Allowance	4	6
Average Recorded Investment	7	9
Residential Real Estate [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	174	178
Recorded Investment with Allowance	174	178
Total Recorded Investment	174	178
Related Allowance	24	24
Average Recorded Investment	176	181
Home Equity Lines Of Credit [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance	323	413
Recorded Investment with Allowance	323	413
Total Recorded Investment	323	413
Related Allowance	149	231
Average Recorded Investment	$ 323	413
Commercial Real Estate [Member]
Financing Receivable Impaired [Line Items]
Unpaid Contractual Principal Balance		10,503
Recorded Investment with Allowance		9,522
Total Recorded Investment		9,522
Related Allowance		722
Average Recorded Investment		$ 9,080

Bank Loans (Aging Of The Record

Bank Loans (Aging Of The Recorded Investment In Past Due Loans) (Details) - USD ($) $ in Thousands		Jun. 30, 2017		Dec. 31, 2016
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		$ 1,227		$ 11,721
Current Balance		6,212,586		5,625,844
Recorded Investment in Loans, Total		6,213,813		5,637,565
Non-Accrual		5,278	[1]	17,234	[2]
Restructured		9,172	[1],[3]	9,700	[2]
Total		14,450	[1]	26,934	[2]
30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,041		11,523
90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		186		198
Residential Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,035		1,923
Current Balance		2,247,493		2,159,477
Recorded Investment in Loans, Total		2,248,528		2,161,400
Restructured		174	[1],[3]	178	[2]
Total		174	[1]	178	[2]
Residential Real Estate [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		1,035		1,923
Commercial And Industrial [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance		2,064,052		1,710,399
Recorded Investment in Loans, Total		2,064,052		1,710,399
Non-Accrual		4,951	[1]	16,815	[2]
Restructured	[1],[3]	8,998
Total		13,949	[1]	16,815	[2]
Securities-Based Loans [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance		1,755,592		1,614,033
Recorded Investment in Loans, Total		1,755,592		1,614,033
Commercial Real Estate [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due				9,522
Current Balance		71,517		69,189
Recorded Investment in Loans, Total		71,517		78,711
Restructured	[2]			9,522
Total	[2]			9,522
Commercial Real Estate [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due				9,522
Consumer [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		8		2
Current Balance		42,658		45,389
Recorded Investment in Loans, Total		42,666		45,391
Non-Accrual		4	[1]	6	[2]
Total		4	[1]	6	[2]
Consumer [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		6
Consumer [Member] | 90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		2		2
Home Equity Lines Of Credit [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		184		274
Current Balance		14,119		14,734
Recorded Investment in Loans, Total		14,303		15,008
Non-Accrual		323	[1]	413	[2]
Total		323	[1]	413	[2]
Home Equity Lines Of Credit [Member] | 30 - 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due				78
Home Equity Lines Of Credit [Member] | 90 or More Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Total Past Due		184		196
Construction And Land [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Current Balance		17,155		12,623
Recorded Investment in Loans, Total		$ 17,155		$ 12,623
[1]	There were no loans past due 90 days and still accruing interest at June 30, 2017.
[2]	There were no loans past due 90 days and still accruing interest at December 31, 2016.
[3]	On non-accrual status.

Bank Loans (Aging Of The Reco71

Bank Loans (Aging Of The Recorded Investment In Past Due Loans) (Parenthetical) (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Receivables [Abstract]
Loans past due 90 days and still accruing interest	$ 0	$ 0

Bank Loans (Risk Category Of Lo

Bank Loans (Risk Category Of Loan Portfolio) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	$ 6,213,813	$ 5,637,565
Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	6,185,117	5,569,259
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	12,751	27,905
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	15,945	40,401
Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	2,248,528	2,161,400
Residential Real Estate [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	2,248,238	2,161,223
Residential Real Estate [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	116
Residential Real Estate [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	174	177
Commercial And Industrial [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	2,064,052	1,710,399
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	2,035,973	1,652,211
Commercial And Industrial [Member] | Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	12,635	27,905
Commercial And Industrial [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	15,444	30,283
Securities-Based Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	1,755,592	1,614,033
Securities-Based Loans [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	1,755,592	1,614,033
Commercial Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	71,517	78,711
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	71,517	69,189
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio		9,522
Consumer [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	42,666	45,391
Consumer [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	42,662	45,385
Consumer [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	4	6
Home Equity Lines Of Credit [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	14,303	15,008
Home Equity Lines Of Credit [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	13,980	14,595
Home Equity Lines Of Credit [Member] | Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	323	413
Construction And Land [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	17,155	12,623
Construction And Land [Member] | Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Total risk category of loan portfolio	$ 17,155	$ 12,623

Goodwill And Intangible Asset73

Goodwill And Intangible Assets (Carrying Amount Of Goodwill And Intangible Assets) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance			$ 962,282
Goodwill, Adjustments			7,482
Goodwill, Ending balance	$ 969,764		969,764
Intangible assets, Beginning balance			116,304
Intangible assets, Net Additions			5,195
Intangible assets, Amortization	(3,200)	$ (5,000)	(6,246)	$ (8,008)
Intangible assets, Ending balance	115,253		115,253
Global Wealth Management [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance			270,779
Goodwill, Adjustments			6,622
Goodwill, Ending balance	277,401		277,401
Intangible assets, Beginning balance			45,231
Intangible assets, Net Additions			3,800
Intangible assets, Amortization			(2,273)
Intangible assets, Ending balance	46,758		46,758
Institutional Group [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Goodwill, Beginning balance			691,503
Goodwill, Adjustments			860
Goodwill, Ending balance	692,363		692,363
Intangible assets, Beginning balance			71,073
Intangible assets, Net Additions			1,395
Intangible assets, Amortization			(3,973)
Intangible assets, Ending balance	$ 68,495		$ 68,495

Goodwill And Intangible Asset74

Goodwill And Intangible Assets (Intangible Assets Subject To Amortization) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 175,453	$ 170,257
Accumulated Amortization	62,318	56,071
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	146,687	141,621
Accumulated Amortization	51,267	46,209
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	24,713	24,713
Accumulated Amortization	9,464	8,670
Investment Banking Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	2,608	1,345
Accumulated Amortization	1,040	379
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,445	2,578
Accumulated Amortization	$ 547	$ 813

Goodwill And Intangible Asset75

Goodwill And Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Schedule of Goodwill and Intangible Assets [Line Items]
Amortization of intangible assets	$ 3,200	$ 5,000	$ 6,246	$ 8,008
Customer Relationships [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets			11 years 2 months 12 days
Trade Name [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets			11 years
Non-Compete Agreements [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets			9 years 10 months 24 days
Backlog [Member]
Schedule of Goodwill and Intangible Assets [Line Items]
Weighted-average remaining lives of intangible assets			3 months

Goodwill And Intangible Asset76

Goodwill And Intangible Assets (Amortization Expense In Future Periods) (Details) $ in Thousands	Jun. 30, 2017USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Remainder of 2017	$ 5,780
2,018	10,953
2,019	10,348
2,020	10,128
2,021	9,611
Thereafter	66,315
Future amortization expense total	$ 113,135

Borrowings (Narrative) (Details

Borrowings (Narrative) (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2017USD ($)item	Jun. 30, 2017USD ($)item	Dec. 31, 2016USD ($)
Short-term Debt [Line Items]
Uncommitted secured lines of credit		$ 1,000,000,000
Number of banks | item	6	6
Daily borrowings under our uncommitted secured lines	$ 444,400,000	$ 444,400,000
Compensating balances	0	0
Trading securities pledged	1,900,000,000	1,900,000,000	$ 1,700,000,000
Revolving Credit Facility
Short-term Debt [Line Items]
Committed revolving credit facility	200,000,000	$ 200,000,000
Revolving credit facility expiration date		2020-03
LIBOR rate		2.00%
Outstanding on our revolving credit facility	0	$ 0
Company Owned Securities [Member]
Short-term Debt [Line Items]
Uncommitted secured lines of credit		105,000,000
Trading securities pledged	$ 242,200,000	$ 242,200,000
Federal Home Loan Bank advances [Member]
Short-term Debt [Line Items]
Weighted average interest rate on borrowings	1.21%	1.18%

Senior Notes (Summary of Senior

Senior Notes (Summary of Senior Notes) (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Jul. 31, 2014
Debt Instrument [Line Items]
Long-term Debt, gross		$ 800,000	$ 800,000
Debt issuance costs, net		(3,704)	(4,109)
Long-term Debt		796,296	795,891
Senior notes 4.250% due 2024 [Member]
Debt Instrument [Line Items]
Long-term Debt, gross	[1]	500,000	500,000
Long-term Debt					$ 300,000
Senior notes 3.50% due 2020 [Member]
Debt Instrument [Line Items]
Long-term Debt, gross	[2]	$ 300,000	$ 300,000
Long-term Debt				$ 300,000
[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.

Senior Notes (Summary of Seni79

Senior Notes (Summary of Senior Notes) (Parenthetical) (Details) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Jul. 31, 2016	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Jul. 31, 2014
Debt Instrument [Line Items]
Stated interest rate		4.25%
Long-term Debt		$ 796,296	$ 795,891
Debt instrument, maturity date		Dec. 31, 2024
Senior notes 4.250% due 2024 [Member]
Debt Instrument [Line Items]
Stated interest rate		4.25%			4.25%
Long-term Debt					$ 300,000
Debt instrument, maturity date		Jul. 31, 2024
Redemption price, percentage of principal amount		100.00%
Additional issuance of long-term debt	$ 200,000
Senior notes 3.50% due 2020 [Member]
Debt Instrument [Line Items]
Stated interest rate		3.50%		3.50%
Long-term Debt				$ 300,000
Debt instrument, maturity date		Dec. 31, 2020
Redemption price, percentage of principal amount		100.00%

Senior Notes (Schedule Of Corpo

Senior Notes (Schedule Of Corporate Debt Principal Maturities) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term Debt	$ 796,296	$ 795,891
Non Recourse Debt [Member]
Debt Instrument [Line Items]
2,020	300,000
Thereafter	500,000
Long-term Debt	$ 800,000

Bank Deposits (Schedule Of Depo

Bank Deposits (Schedule Of Deposits) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Deposits Liabilities Balance Sheet Reported Amounts [Abstract]
Money market and savings accounts	$ 11,804,509	$ 11,264,285
Demand deposits (interest-bearing)	235,269	253,545
Demand deposits (non-interest-bearing)	7,851	5,752
Certificates of deposit	2,845	3,901
Bank deposits	$ 12,050,474	$ 11,527,483

Bank Deposits (Narrative) (Deta

Bank Deposits (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Bank Deposits [Line Items]
Weighted average interest rate on deposits	0.06%	0.09%
Brokerage Customers Deposits [Member]
Bank Deposits [Line Items]
Deposits of related parties	$ 12,100	$ 11,500
Stifel Nicolaus [Member]
Bank Deposits [Line Items]
Interest bearing and time deposits of executive officers, directors, and affiliates	$ 0.2	$ 0.5

Derivative Instruments And He83

Derivative Instruments And Hedging Activities (Schedule Of Notional Values And Fair Values Of Derivative Instruments) (Details) - Cash Flow Interest Rate Contracts [Member] - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional Value	$ 790,000,000	$ 790,000,000
Liability Derivatives, Notional Value	100,983,000	121,442,000
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	8,442,000	10,390,000
Accounts Payable and Accrued Expenses [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 939,000	$ 1,823,000

Derivative Instruments And He84

Derivative Instruments And Hedging Activities (Narrative) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2017USD ($)
General Discussion Of Derivative Instruments And Hedging Activities [Abstract]
Average remaining life of interest rate swap agreements	2 years 10 months 24 days
Estimated derivatives to be reclassified as increase to interest expense	$ 0.3
Fair value of derivative net liability position	0.9
Derivative counterparty posted collateral against obligation	$ 9.8

Derivative Instruments And He85

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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized Due to Ineffectiveness		$ 33		$ 46
Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) Recognized in OCI (Effectiveness)	$ 3,340	(7,099)	$ 2,576	(16,525)
Loss Reclassified From OCI Into Income	$ 622	$ 1,537	$ 1,534	$ 2,882

Disclosures About Offsetting 86

Disclosures About Offsetting Assets And Liabilities (Financial Assets And Derivative Assets That Are Subject To Offset) (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Offsetting [Abstract]
Gross amounts of recognized assets, Securities borrowing	[1]	$ 145,285	$ 382,691
Net amounts presented in the Statement of Financial Condition, Securities borrowing	[1]	145,285	382,691
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities borrowing	[1]	(99,074)	(291,793)
Gross amounts not offset in the Statement of Financial Position, Collateral received, Securities borrowing	[1]	(34,768)	(68,776)
Securities borrowed, Net amount	[1]	11,443	22,122
Gross amounts of recognized assets, Reverse repurchase agreements	[2]	478,091	248,588
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell	[2]	478,091	248,588
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell	[2]	(205,017)	(216,542)
Gross amounts not offset in the Statement of Financial Position, Collateral received, Securities purchased under agreements to resell	[2]	(273,074)	(32,046)
Gross amounts of recognized assets, Cash flow interest rate contracts		8,442	10,390
Net amounts presented in the Statement of Financial Condition, Cash flow interest rate contracts		8,442	10,390
Cash flow interest rate contracts, Net amount		8,442	10,390
Gross amounts of recognized assets		631,818	641,669
Net amounts presented in the Statements of Financial Condition		631,818	641,669
Gross amounts not offset in the Statement of Financial Position		(304,091)	(508,335)
Gross amounts not offset in the Statement of Financial Position, Collateral received		(307,842)	(100,822)
Net amount		$ 19,885	$ 32,512
[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 $474.1 million and $248.5 million at June 30, 2017 and December 31, 2016, respectively.

Disclosures About Offsetting 87

Disclosures About Offsetting Assets And Liabilities (Financial Assets And Derivative Assets That Are Subject To Offset) (Details) (Parenthetical) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Offsetting Assets [Line Items]
Fair value of securities pledged as collateral	[1]	$ 273,074	$ 32,046
Securities Pledged As Collateral [Member]
Offsetting Assets [Line Items]
Fair value of securities pledged as collateral		$ 474,100	$ 248,500
[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 $474.1 million and $248.5 million at June 30, 2017 and December 31, 2016, respectively.

Disclosures About Offsetting 88

Disclosures About Offsetting Assets And Liabilities (Financial Liabilities And Derivative Liabilities That Are Subject To Offset) (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Offsetting [Abstract]
Gross amounts of recognized liabilities, Securities lending	[1]	$ (352,127)	$ (478,814)
Net amounts presented in the Statement of Financial Condition, Securities lending	[1]	(352,127)	(478,814)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities lending	[1]	99,074	291,793
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities lending	[1]	234,970	175,849
Securities lending, Net amount	[1]	(18,083)	(11,172)
Gross amounts of recognized liabilities, Securities purchased under agreements to resell	[2]	(243,999)	(268,546)
Net amounts presented in the Statement of Financial Condition, Securities purchased under agreements to resell	[2]	(243,999)	(268,546)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Securities purchased under agreements to resell	[2]	205,017	216,542
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Securities purchased under agreements to resell	[2]	38,982	52,004
Gross amount of recognized liabilities, Cash flow interest rate contracts		(939)	(1,823)
Net amounts presented in the Statement of Financial Condition, Cash flow interest rate contracts		(939)	(1,823)
Gross amounts not offset in the Statement of Financial Position, Financial instruments, Cash flow interest rate contracts		900
Gross amounts not offset in the Statement of Financial Position, Collateral pledged, Cash flow interest rate contracts		939	1,823
Gross amounts of recognized liabilities		(597,065)	(749,183)
Net amounts presented in the Statement of Financial Condition		(597,065)	(749,183)
Gross amounts not offset in the Statement of Financial Position, Financial instruments		304,091	508,335
Gross amounts not offset in the Statement of Financial Condition, Collateral pledged		274,891	229,676
Net amount		$ (18,083)	$ (11,172)
[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 counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $263.8 million and $299.3 million at June 30, 2017 and December 31, 2016, respectively.

Disclosures About Offsetting 89

Disclosures About Offsetting Assets And Liabilities (Financial Liabilities And Derivative Liabilities That Are Subject To Offset) (Details) (Parenthetical) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Offsetting Liabilities [Line Items]
Fair value of securities pledged as collateral to counter party	[1]	$ 38,982	$ 52,004
U.S. Government Agency Securities And U.S. Government Securities And Corporate Fixed Income Securities [Member] | Securities Pledged As Collateral [Member]
Offsetting Liabilities [Line Items]
Fair value of securities pledged as collateral to counter party		$ 263,800	$ 299,300
[1]	Collateral pledged includes the fair value of securities pledged by our company to the counter party. These securities are included on the consolidated statements of financial condition unless we default. Collateral pledged by our company to the counter party includes U.S. government agency securities, U.S. government securities, and corporate fixed income securities with market values of $263.8 million and $299.3 million at June 30, 2017 and December 31, 2016, respectively.

Legal Proceedings (Narrative) (

Legal Proceedings (Narrative) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2017USD ($)
Stone & Youngberg [Member]
Loss Contingencies [Line Items]
Loss contingency, damages sought, value	$ 200
CA Funds [Member]
Loss Contingencies [Line Items]
Loss contingency, damages sought, value	$ 90
Loss contingency, damages sought	In a related action, approximately one dozen individual investors brought a direct action against the Company and other defendants, seeking recessionary damages of approximately $90 million.
Loss contingency, actions taken by court	The court ruled that the individual plaintiffs had no standing to pursue these claims because the CA funds are separately pursuing claims.

Regulatory Capital Requiremen91

Regulatory Capital Requirements (Narrative) (Details) $ in Millions	Jun. 30, 2017USD ($)
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	17.70%
Net capital	$ 276.3
Excess of minimum required net capital	245
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 Requiremen92

Regulatory Capital Requirements (Schedule Of Total Risk-Based, Tier 1 Risk-Based, And Tier 1 Leverage Ratios) (Details) $ in Thousands	Jun. 30, 2017USD ($)
Stifel Bank [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Common equity tier 1, Actual Amount	$ 972,080
Common equity tier 1, Actual Ratio	14.90%
Common equity tier 1, For Capital Adequacy Purposes Amount	$ 392,750
Common equity tier 1, For Capital Adequacy Purposes Ratio	6.00%
Common equity tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 523,667
Common equity tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	8.00%
Total capital, Actual Amount	$ 1,028,447
Total capital, Actual Ratio	15.70%
Total capital, For Capital Adequacy Purposes Amount	$ 523,667
Total capital, For Capital Adequacy Purposes Ratio	8.00%
Total capital, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 654,583
Total capital, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%
Tier 1 leverage, Actual Amount	$ 972,080
Tier 1 leverage, Actual Ratio	7.20%
Tier 1 leverage, For Capital Adequacy Purposes Amount	$ 540,643
Tier 1 leverage, For Capital Adequacy Purposes Ratio	4.00%
Tier 1 leverage, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 675,804
Tier 1 leverage, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%
Common Stock [Member] | Stifel Bank [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Common equity tier 1, Actual Amount	$ 972,080
Common equity tier 1, Actual Ratio	14.90%
Common equity tier 1, For Capital Adequacy Purposes Amount	$ 294,562
Common equity tier 1, For Capital Adequacy Purposes Ratio	4.50%
Common equity tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 425,479
Common equity tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.50%
Stifel Financial Corp. [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Common equity tier 1, Actual Amount	$ 1,889,208
Common equity tier 1, Actual Ratio	20.50%
Common equity tier 1, For Capital Adequacy Purposes Amount	$ 552,824
Common equity tier 1, For Capital Adequacy Purposes Ratio	6.00%
Common equity tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 737,099
Common equity tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	8.00%
Total capital, Actual Amount	$ 1,943,420
Total capital, Actual Ratio	21.10%
Total capital, For Capital Adequacy Purposes Amount	$ 737,099
Total capital, For Capital Adequacy Purposes Ratio	8.00%
Total capital, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 921,374
Total capital, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%
Tier 1 leverage, Actual Amount	$ 1,889,208
Tier 1 leverage, Actual Ratio	10.30%
Tier 1 leverage, For Capital Adequacy Purposes Amount	$ 734,557
Tier 1 leverage, For Capital Adequacy Purposes Ratio	4.00%
Tier 1 leverage, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 918,196
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]
Common equity tier 1, Actual Amount	$ 1,679,604
Common equity tier 1, Actual Ratio	18.20%
Common equity tier 1, For Capital Adequacy Purposes Amount	$ 414,618
Common equity tier 1, For Capital Adequacy Purposes Ratio	4.50%
Common equity tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 598,893
Common equity tier 1, To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.50%

Interest Income And Interest 93

Interest Income And Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest Income Expense Net [Abstract]
Bank loans, net	$ 48,729	$ 29,475	$ 93,489	$ 56,033
Investment securities	46,385	24,446	88,051	46,807
Margin balances	9,022	8,151	17,205	16,697
Inventory	4,346	4,519	8,582	9,017
Other	469	(811)	2,577	53
Total interest income	108,951	65,780	209,904	128,607
Senior notes	8,140	8,179	16,280	16,354
Bank deposits	1,887	1,842	3,654	3,743
Federal Home Loan Bank advances	2,797	2,635	4,516	3,392
Other	3,820	4,606	8,090	7,884
Total interest expense	$ 16,644	$ 17,262	$ 32,540	$ 31,373

Employee Incentive, Deferred 94

Employee Incentive, Deferred Compensation, And Retirement Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized to grant			5,900,000
Stock-based compensation			$ 55,266	$ 94,349
Provision for income tax expense (benefit)	$ 30,387	$ 6,022	43,894	22,880
Investments, at fair value	128,332		128,332		$ 133,563
Deferred compensation liability	5,300		5,300		8,600
Contributions to the Profit Sharing Plan	$ 3,300	1,600	$ 3,700	2,900
Mutual Funds [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of earnings deferred into mutual funds	2.00%		2.00%
Investments, at fair value	$ 12,400		$ 12,400		$ 11,300
Incentive Stock Award Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	34,400	65,900	65,600	94,800
Tax impact related to stock-based compensation provision		$ 1,000		$ 5,200
Incentive Stock Award Plans [Member] | ASU No. 2016-09 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Provision for income tax expense (benefit)	$ (200)		$ (17,100)
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of stock units outstanding	19,600,000		19,600,000
Unvested stock units outstanding	16,200,000		16,200,000
Unrecognized compensation expense related to non-vested options	$ 361,200		$ 361,200
Weighted-average period, compensation cost expected to recognized, in years			3 years
Performance-based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years			5 years
Total number of stock units outstanding	600,000		600,000
Unvested stock units outstanding	600,000		600,000
Award performance period			4 years
SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Elective deferrals vested percentage	100.00%		100.00%
Percentage of earnings deferred into company stock units	4.00%		4.00%
Percentage of earnings deferred into company stock units, Company match	25.00%		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] | Incentive Stock Award Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years			1 year
Minimum [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years			1 year
Minimum [Member] | Performance-based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential percentage of converted shares			0.00%
Minimum [Member] | SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years			1 year
Maximum [Member] | Deferred Compensation Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years			8 years
Maximum [Member] | Incentive Stock Award Plans [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] | SWAP Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period in years			8 years

Off-Balance Sheet Credit Risk (

Off-Balance Sheet Credit Risk (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
General settlement period of securities transactions	3 days
Fair value of securities accepted as collateral permitted to sell or repledge	$ 2,400	$ 2,500
Fair value of collateral securities sold or repledged	244	268.5
Outstanding commitments to originate loans	213.2	205.8
Letters of credit outstanding	90.2	88.9
Unused Lines Of Credit [Member]
Fair Value Off Balance Sheet Risks Disclosure Information [Line Items]
Unused lines of credit to commercial and consumer borrowers	$ 559.9	$ 492.5
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)	6 Months Ended
	Jun. 30, 2017Segment
Segment Reporting Information [Line Items]
Number of business segments	3
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Number of businesses within reportable segment	2

Segment Reporting (Schedule Of

Segment Reporting (Schedule Of Operating Information, Segment) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Net revenues	[1]	$ 725,647	$ 652,145	$ 1,401,178	$ 1,272,119
Income/(loss) before income taxes		83,198	15,793	162,217	59,706
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	451,990	386,039	894,722	765,843
Income/(loss) before income taxes		153,237	105,053	295,289	198,387
Institutional Group [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	276,153	260,920	513,620	502,196
Income/(loss) before income taxes		52,892	42,414	92,764	71,705
Other [Member]
Segment Reporting Information [Line Items]
Net revenues	[1]	(2,496)	5,186	(7,164)	4,080
Income/(loss) before income taxes		$ (122,931)	$ (131,674)	$ (225,836)	$ (210,386)
[1]	No individual client accounted for more than 10 percent of total net revenues for the three and six months ended June 30, 2017 or 2016.

Segment Reporting (Schedule O98

Segment Reporting (Schedule Of Operating Information, Segment) (Parenthetical) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting [Abstract]
Net revenues accounted for by individual client, maximum percentage	10.00%	10.00%	10.00%	10.00%

Segment Reporting (Schedule O99

Segment Reporting (Schedule Of Information Of Total Assets On Segment Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total assets	$ 19,533,575	$ 19,129,356
Global Wealth Management [Member]
Segment Reporting Information [Line Items]
Total assets	16,692,046	16,065,503
Institutional Group [Member]
Segment Reporting Information [Line Items]
Total assets	2,464,369	2,657,183
Other [Member]
Segment Reporting Information [Line Items]
Total assets	$ 377,160	$ 406,670

Segment Reporting (Schedule 100

Segment Reporting (Schedule Of Net Revenues Earned On Major Geographical Areas) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Total net revenues	[1]	$ 725,647	$ 652,145	$ 1,401,178	$ 1,272,119
United States [Member]
Segment Reporting Information [Line Items]
Total net revenues		690,930	611,984	1,339,261	1,193,721
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total net revenues		32,771	37,844	57,290	73,592
Other European [Member]
Segment Reporting Information [Line Items]
Total net revenues		$ 1,946	$ 2,317	$ 4,627	$ 4,806
[1]	No individual client accounted for more than 10 percent of total net revenues for the three and six months ended June 30, 2017 or 2016.

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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Net income	$ 52,811	$ 9,771	$ 118,323	$ 36,826
Preferred dividends	2,344		4,688
Net income available to common shareholders	$ 50,467	$ 9,771	$ 113,635	$ 36,826
Average shares used in basic computation	68,556	66,792	68,471	67,186
Dilutive effect of stock options and units	11,465	9,190	11,920	8,898
Average shares used in diluted computation	80,021	75,982	80,391	76,084
Basic	$ 0.74	$ 0.15	$ 1.66	$ 0.55
Diluted	$ 0.63	$ 0.13	$ 1.41	$ 0.48

Shareholders' Equity (Details)

Shareholders' Equity (Details) - USD ($)	Jan. 03, 2017	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Number of shares authorized to be repurchased		7,100,000			7,100,000
Purchase of treasury stock		$ 13,000,000	$ 0	$ 3,700,000		$ 95,100,000
Treasury Stock, Shares, Acquired		300,000		100,000		2,800,000
Treasury Stock Acquired, Average Cost Per Share		$ 43.83		$ 29.70		$ 33.79
Common stock reissued					1,700,000
City Securities [Member]
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Stock Issued During Period Shares Acquisitions	200,000

Variable Interest Entities (Det

Variable Interest Entities (Details)	6 Months Ended
	Jun. 30, 2017USD ($)item	Dec. 31, 2016USD ($)
Variable Interest Entity [Line Items]
Assets in partnership	$ 167,900,000
Convertible promissory note to FSI	$ 18,000,000
Number of extension options | item	3
Extension options, period	5 years
Potential ownership interest upon conversion of notes issued to FSI	49.90%
Convertible promissory note minimum coupon rate	8.00%
Maximum rate of interest related to certain defined cash flows	18.00%
Liabilities related to VIE	$ 16,688,266,000	$ 16,390,948,000
Stifel Financial Corp. [Member]
Variable Interest Entity [Line Items]
Loss exposure	18,000,000
Weisel Capital Management LLC [Member]
Variable Interest Entity [Line Items]
Assets in partnership	315,600,000
FSI Group, LLC [Member]
Variable Interest Entity [Line Items]
Liabilities related to VIE	$ 0

Subsequent Events (Details)

Subsequent Events (Details)	6 Months Ended
	Jun. 30, 2017item
Subsequent Events [Abstract]
Number of types of subsequent events	2