Nature of Operations and Basis of Presentation (Policy)	9 Months Ended
Sep. 30, 2011
Nature of Operations and Basis of Presentation
Nature of Operations	*Nature of Operations* Stifel Financial Corp. (the "Parent"), through its wholly owned subsidiaries, principally Stifel, Nicolaus & Company, Incorporated ("Stifel Nicolaus"), Stifel Bank & Trust ("Stifel Bank"), Stifel Nicolaus Limited ("SN Ltd"), Century Securities Associates, Inc. ("CSA"), Stifel Nicolaus Canada, Inc. ("SN Canada"), Thomas Weisel Partners LLC ("TWP"), and Thomas Weisel Partners International Limited ("TWPIL"), is principally engaged in retail brokerage; securities trading; investment banking; investment advisory; retail, consumer, and commercial banking; and related financial services. Although we have offices throughout the United States, two Canadian cities, and three European cities, our major geographic area of concentration is in the Midwest and Mid-Atlantic regions, with a growing presence in the Northeast, Southeast and Western United States. Our company's principal customers are individual investors, corporations, municipalities, and institutions. On July 1, 2010, we acquired Thomas Weisel Partners Group, Inc. ("TWPG"), an investment bank focused principally on the growth sectors of the economy, which generates revenues from three principal sources: investment banking, brokerage, and asset management. The investment banking group is comprised of two primary categories of services: corporate finance and strategic advisory. The brokerage group provides equity sales and trading services to institutional investors and offers brokerage and advisory services to high-net-worth individuals and corporate clients. The asset management group consists of: private investment funds, public equity investment products, and distribution management. The employees of the investment banking, research, and institutional brokerage businesses of TWP, a wholly owned subsidiary of TWPG, were transitioned into Stifel Nicolaus during the third quarter of 2010. TWP remains a wholly owned broker-dealer subsidiary of the Parent.
Basis of Presentation	*Basis of Presentation* The consolidated financial statements include Stifel Financial Corp. and its wholly owned subsidiaries, principally Stifel Nicolaus and 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, 2010 on file with the SEC. On April 5, 2011, we effected a three-for-two stock split to shareholders of record as of March 22, 2011. All share and per share information has been retroactively adjusted to reflect the stock split. Certain amounts from prior periods have been reclassified to conform to the current period's presentation. The effect of these reclassifications on our company's previously reported consolidated financial statements was not material. 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, 2010. *Consolidation Policies* The consolidated financial statements include the accounts of Stifel Financial Corp. and its subsidiaries. We also have investments or interests in other entities for which we must evaluate whether to consolidate by determining whether we have a controlling financial interest or are considered to be the primary beneficiary. In determining whether to consolidate these entities or not, we determine whether the entity is a voting interest entity or a variable interest entity ("VIE"). *Voting Interest Entity.* Voting interest entities are entities that have (i) total equity investment at risk sufficient to fund expected future operations independently, and (ii) equity holders who have the obligation to absorb losses or receive residual returns and the right to make decisions about the entity's activities. We consolidate voting interest entities when we determine that there is a controlling financial interest, usually ownership of all, or a majority of, the voting interest. *Variable Interest Entity.* VIEs are entities that lack one or more of the characteristics of a voting interest entity. We are required to consolidate VIEs in which we are deemed to be the primary beneficiary. The primary beneficiary is defined as the entity that has a variable interest, or a combination of variable interests, that maintains control and provides benefits or will either: (i) absorb a majority of the VIEs expected losses, (ii) receive a majority of the VIEs expected returns, or (iii) both. We determine whether we are the primary beneficiary of a VIE by first performing a qualitative analysis of the VIE's control structure, expected losses and expected residual returns. This analysis includes a review of, among other factors, the VIE's capital structure, contractual terms, which interests create or absorb variability, related party relationships, and the design of the VIE. Where qualitative analysis is not conclusive, we perform a quantitative analysis. We reassess our initial evaluation of an entity as a VIE and our initial determination of whether we are the primary beneficiary of a VIE upon the occurrence of certain reconsideration events. See Note 25 for additional information on variable interest entities.

Basis of Presentation

The consolidated financial statements include Stifel Financial Corp. and its wholly owned subsidiaries, principally Stifel Nicolaus and 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, 2010 on file with the SEC.

On April 5, 2011, we effected a three-for-two stock split to shareholders of record as of March 22, 2011. All share and per share information has been retroactively adjusted to reflect the stock split.

Certain amounts from prior periods have been reclassified to conform to the current period's presentation. The effect of these reclassifications on our company's previously reported consolidated financial statements was not material.

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, 2010.

Consolidation Policies

The consolidated financial statements include the accounts of Stifel Financial Corp. and its subsidiaries. We also have investments or interests in other entities for which we must evaluate whether to consolidate by determining whether we have a controlling financial interest or are considered to be the primary beneficiary. In determining whether to consolidate these entities or not, we determine whether the entity is a voting interest entity or a variable interest entity ("VIE").

Voting Interest Entity. Voting interest entities are entities that have (i) total equity investment at risk sufficient to fund expected future operations independently, and (ii) equity holders who have the obligation to absorb losses or receive residual returns and the right to make decisions about the entity's activities. We consolidate voting interest entities when we determine that there is a controlling financial interest, usually ownership of all, or a majority of, the voting interest.

Variable Interest Entity. VIEs are entities that lack one or more of the characteristics of a voting interest entity. We are required to consolidate VIEs in which we are deemed to be the primary beneficiary. The primary beneficiary is defined as the entity that has a variable interest, or a combination of variable interests, that maintains control and provides benefits or will either: (i) absorb a majority of the VIEs expected losses, (ii) receive a majority of the VIEs expected returns, or (iii) both.

We determine whether we are the primary beneficiary of a VIE by first performing a qualitative analysis of the VIE's control structure, expected losses and expected residual returns. This analysis includes a review of, among other factors, the VIE's capital structure, contractual terms, which interests create or absorb variability, related party relationships, and the design of the VIE. Where qualitative analysis is not conclusive, we perform a quantitative analysis. We reassess our initial evaluation of an entity as a VIE and our initial determination of whether we are the primary beneficiary of a VIE upon the occurrence of certain reconsideration events. See Note 25 for additional information on variable interest entities.