Organization And Nature Of Operations	9 Months Ended
Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization And Nature Of Operations	1. ORGANIZATION AND NATURE OF OPERATIONS The Formation Transaction Cohen Brothers was formed on October 7, 2004 by Cohen Bros. Financial, LLC (“CBF”). Cohen Brothers was established to acquire the net assets of CBF’s subsidiaries (the “Formation Transaction”): Cohen Bros. & Company, Inc.; Cohen Frères SAS; Dekania Investors, LLC; Emporia Capital Management, LLC; and the majority interest in Cohen Bros. & Tororian Investment Management, Inc. The Formation Transaction was accomplished through a series of transactions occurring between March 4, 2005 and May 31, 2005. The Company From its formation until December 16, 2009, Cohen Brothers operated as a privately owned limited liability company. On December 16, 2009, Cohen Brothers completed its merger (the “Merger”) with a subsidiary of Alesco Financial Inc. (“AFN”) a publicly traded real estate investment trust. As a result of the Merger, AFN contributed substantially all of its assets into Cohen Brothers in exchange for newly issued membership units directly from Cohen Brothers. In addition, AFN received additional Cohen Brothers membership interests directly from its members in exchange for AFN common stock. In accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”), the Merger was accounted for as a reverse acquisition, and Cohen Brothers was deemed to be the accounting acquirer. As a result, all of AFN’s assets and liabilities were required to be revalued at fair value as of the acquisition date. The remaining membership interests of Cohen Brothers that are not held by AFN are included as a component of non-controlling interest in the consolidated balance sheet. Subsequent to the Merger, AFN was renamed Cohen & Company Inc. In January 2011, it was renamed again as Institutional Financial Markets, Inc. (“IFMI”). Effective January 1, 2010, the Company ceased to qualify as a real estate investment trust, or a REIT. The Company trades on the NYSE MKT LLC (formerly known as the NYSE Amex LLC) under the ticker symbol “IFMI.” The Company is a financial services company specializing in credit related fixed income investments. As of September 30, 2013, the Company had $5.7 billion in assets under management (“AUM”) of which 94% or $5.4 billion, was in collateralized debt obligations (“CDOs”). In these financial statements, the “Company” refers to IFMI and its subsidiaries on a consolidated basis; “IFMI, LLC” (formerly Cohen Brothers, LLC) or the “Operating LLC” refers to the main operating subsidiary of the Company; “Cohen Brothers” refers to the pre-Merger Cohen Brothers, LLC and its subsidiaries; “AFN” refers to the pre-merger Alesco Financial Inc. and its subsidiaries. When the term “IFMI” is used, it is referring to the parent company itself, Institutional Financial Markets, Inc. “JVB Holdings” refers to JVB Financial Holdings, L.L.C.; “JVB” refers to JVB Financial Group LLC, a broker dealer subsidiary; “CCFL” refers to Cohen & Company Financial Limited (formerly known as EuroDekania Management LTD), a subsidiary regulated by the Financial Conduct Authority (formerly known as Financial Services Authority) in the United Kingdom; “CCPRH” refers to C&Co/PrinceRidge Holdings LP (formerly known as PrinceRidge Holdings LP) and its subsidiaries; “PrinceRidge GP” refers to C&Co/PrinceRidge Partners LLC, (formerly known as PrinceRidge Partners LLC). “PrinceRidge” refers to CCPRH together with PrinceRidge GP; and “CCPR” refers to C&Co/PrinceRidge LLC (formerly known as The PrinceRidge Group LLC), a broker dealer subsidiary. The Company’s business is organized into the following three business segments: Capital Markets: The Company’s Capital Markets business segment consists primarily of credit-related fixed income securities sales, trading, and financing, as well as new issue placements in corporate and securitized products and advisory services. The Company’s fixed income sales and trading group provides trade execution to corporate investors, institutional investors and other smaller broker-dealers. The Company specializes in a variety of products, including but not limited to: corporate bonds and loans, asset backed securities (“ABS”), mortgage backed securities (“MBS”), commercial mortgage backed securities (“CMBS”), residential mortgage backed securities (“RMBS”), CDOs, collateralized loan obligations (“CLOs”), collateralized bond obligations (“CBOs”), collateralized mortgage obligations (“CMOs”), municipal securities, to-be-announced securities (“TBAs”) contracts, Small Business Administration (“SBA”) loans, U.S. government bonds, U.S. government agency securities, brokered deposits and CDs for small banks, hybrid capital of financial institutions including trust preferred securities (“TruPS”), whole loans, and other structured financial instruments. The Company also offers execution and brokerage services for equity products. The Company had offered execution and brokerage services for equity derivative products until December 31, 2012 when the Company sold its equity derivatives brokerage business to a new entity owned by two of the Company’s former employees. See note 5 to the Company’s consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012, as amended. The Company carries out its capital market activities primarily through its subsidiaries: JVB and PrinceRidge in the United States, and CCFL in Europe. Asset Management: The Company’s Asset Management business segment manages assets within CDOs, permanent capital vehicles, managed accounts, and investment funds (collectively referred to as “Investment Vehicles”). A CDO is a form of secured borrowing. The borrowing is secured by different types of fixed income assets such as corporate or mortgage loans or bonds. The borrowing is in the form of a securitization, which means that the lenders are actually investing in notes backed by the assets. In the event of default, the lenders will have recourse only to the assets securing the loan. The Company’s Asset Management business segment includes its fee-based asset management operations which include ongoing base and incentive management fees. Principal Investing: The Company’s Principal Investing business segment is comprised primarily of its investments in certain Investment Vehicles it manages, as well as investments in structured products, and the related gains and losses that they generate. The Company generates its revenue by business segment primarily through the following activities: Capital Markets: • trading activities of the Company, which include execution and brokerage services, securities lending activities, riskless trading activities as well as gains and losses (unrealized and realized) and income and expense earned on securities classified as trading; •new issue and advisory revenue comprised primarily of (i) origination fees for corporate debt issues originated by the Company; (ii) revenue from advisory services; and (iii) new issue revenue associated with arranging and placing the issuance of newly created debt, equity, and hybrid financial instruments; Asset Management: • asset management fees for the Company’s on-going asset management services provided to certain Investment Vehicles, which may include fees both senior and subordinate to the securities in the Investment Vehicle; and incentive management fees earned based on the performance of the various Investment Vehicles; • income or loss from equity method affiliates; Principal Investing: •gains and losses (unrealized and realized) and income and expense earned on securities (primarily on investments in Investment Vehicles the Company manages) classified as other investments, at fair value; and • income or loss from equity method affiliates.

1. ORGANIZATION AND NATURE OF OPERATIONS

The Formation Transaction

Cohen Brothers was formed on October 7, 2004 by Cohen Bros. Financial, LLC (“CBF”). Cohen Brothers was established to acquire the net assets of CBF’s subsidiaries (the “Formation Transaction”): Cohen Bros. & Company, Inc.; Cohen Frères SAS; Dekania Investors, LLC; Emporia Capital Management, LLC; and the majority interest in Cohen Bros. & Tororian Investment Management, Inc. The Formation Transaction was accomplished through a series of transactions occurring between March 4, 2005 and May 31, 2005.

The Company

From its formation until December 16, 2009, Cohen Brothers operated as a privately owned limited liability company. On December 16, 2009, Cohen Brothers completed its merger (the “Merger”) with a subsidiary of Alesco Financial Inc. (“AFN”) a publicly traded real estate investment trust.

As a result of the Merger, AFN contributed substantially all of its assets into Cohen Brothers in exchange for newly issued membership units directly from Cohen Brothers. In addition, AFN received additional Cohen Brothers membership interests directly from its members in exchange for AFN common stock. In accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”), the Merger was accounted for as a reverse acquisition, and Cohen Brothers was deemed to be the accounting acquirer. As a result, all of AFN’s assets and liabilities were required to be revalued at fair value as of the acquisition date. The remaining membership interests of Cohen Brothers that are not held by AFN are included as a component of non-controlling interest in the consolidated balance sheet.

Subsequent to the Merger, AFN was renamed Cohen & Company Inc. In January 2011, it was renamed again as Institutional Financial Markets, Inc. (“IFMI”). Effective January 1, 2010, the Company ceased to qualify as a real estate investment trust, or a REIT. The Company trades on the NYSE MKT LLC (formerly known as the NYSE Amex LLC) under the ticker symbol “IFMI.” The Company is a financial services company specializing in credit related fixed income investments. As of September 30, 2013, the Company had $5.7 billion in assets under management (“AUM”) of which 94% or $5.4 billion, was in collateralized debt obligations (“CDOs”).

In these financial statements, the “Company” refers to IFMI and its subsidiaries on a consolidated basis; “IFMI, LLC” (formerly Cohen Brothers, LLC) or the “Operating LLC” refers to the main operating subsidiary of the Company; “Cohen Brothers” refers to the pre-Merger Cohen Brothers, LLC and its subsidiaries; “AFN” refers to the pre-merger Alesco Financial Inc. and its subsidiaries. When the term “IFMI” is used, it is referring to the parent company itself, Institutional Financial Markets, Inc. “JVB Holdings” refers to JVB Financial Holdings, L.L.C.; “JVB” refers to JVB Financial Group LLC, a broker dealer subsidiary; “CCFL” refers to Cohen & Company Financial Limited (formerly known as EuroDekania Management LTD), a subsidiary regulated by the Financial Conduct Authority (formerly known as Financial Services Authority) in the United Kingdom; “CCPRH” refers to C&Co/PrinceRidge Holdings LP (formerly known as PrinceRidge Holdings LP) and its subsidiaries; “PrinceRidge GP” refers to C&Co/PrinceRidge Partners LLC, (formerly known as PrinceRidge Partners LLC). “PrinceRidge” refers to CCPRH together with PrinceRidge GP; and “CCPR” refers to C&Co/PrinceRidge LLC (formerly known as The PrinceRidge Group LLC), a broker dealer subsidiary.

The Company’s business is organized into the following three business segments:

Capital Markets: The Company’s Capital Markets business segment consists primarily of credit-related fixed income securities sales, trading, and financing, as well as new issue placements in corporate and securitized products and advisory services. The Company’s fixed income sales and trading group provides trade execution to corporate investors, institutional investors and other smaller broker-dealers. The Company specializes in a variety of products, including but not limited to: corporate bonds and loans, asset backed securities (“ABS”), mortgage backed securities (“MBS”), commercial mortgage backed securities (“CMBS”), residential mortgage backed securities (“RMBS”), CDOs, collateralized loan obligations (“CLOs”), collateralized bond obligations (“CBOs”), collateralized mortgage obligations (“CMOs”), municipal securities, to-be-announced securities (“TBAs”) contracts, Small Business Administration (“SBA”) loans, U.S. government bonds, U.S. government agency securities, brokered deposits and CDs for small banks, hybrid capital of financial institutions including trust preferred securities (“TruPS”), whole loans, and other structured financial instruments. The Company also offers execution and brokerage services for equity products. The Company had offered execution and brokerage services for equity derivative products until December 31, 2012 when the Company sold its equity derivatives brokerage business to a new entity owned by two of the Company’s former employees. See note 5 to the Company’s consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012, as amended. The Company carries out its capital market activities primarily through its subsidiaries: JVB and PrinceRidge in the United States, and CCFL in Europe.

Asset Management: The Company’s Asset Management business segment manages assets within CDOs, permanent capital vehicles, managed accounts, and investment funds (collectively referred to as “Investment Vehicles”). A CDO is a form of secured borrowing. The borrowing is secured by different types of fixed income assets such as corporate or mortgage loans or bonds. The borrowing is in the form of a securitization, which means that the lenders are actually investing in notes backed by the assets. In the event of default, the lenders will have recourse only to the assets securing the loan. The Company’s Asset Management business segment includes its fee-based asset management operations which include ongoing base and incentive management fees.

Principal Investing: The Company’s Principal Investing business segment is comprised primarily of its investments in certain Investment Vehicles it manages, as well as investments in structured products, and the related gains and losses that they generate.

The Company generates its revenue by business segment primarily through the following activities:

Capital Markets:

• trading activities of the Company, which include execution and brokerage services, securities lending activities, riskless trading activities as well as gains and losses (unrealized and realized) and income and expense earned on securities classified as trading;

•new issue and advisory revenue comprised primarily of (i) origination fees for corporate debt issues originated by the Company; (ii) revenue from advisory services; and (iii) new issue revenue associated with arranging and placing the issuance of newly created debt, equity, and hybrid financial instruments;

Asset Management:

• asset management fees for the Company’s on-going asset management services provided to certain Investment Vehicles, which may include fees both senior and subordinate to the securities in the Investment Vehicle; and incentive management fees earned based on the performance of the various Investment Vehicles;

• income or loss from equity method affiliates;

Principal Investing:

•gains and losses (unrealized and realized) and income and expense earned on securities (primarily on investments in Investment Vehicles the Company manages) classified as other investments, at fair value; and

• income or loss from equity method affiliates.