Commitments and Contingencies	6 Months Ended
Jun. 30, 2013
Commitments And Contingencies [Abstract]
Commitments And Contingencies	17. COMMITMENTS AND CONTINGENCIES Legal and Regulatory Proceedings The Company was named in litigation commenced in the United States District Court for the Southern District of New York on June 29, 2012, under the caption U.S. Bank National Association v. Institutional Financial Markets, Inc. The plaintiff, U.S. Bank, alleges breach of contract respecting certain fees allegedly owing to U.S. Bank, as Trustee, in connection with the issuance of trust preferred securities, seeking damages and a declaration that the Company must make certain future fee payments. The Company filed a motion to dismiss the complaint in lieu of an answer on October 26, 2012. U.S. Bank filed its response to the motion on November 26, 2012. On July 19, 2013, the court entered a Memorandum and Order denying the Company’s motion to dismiss. The Company has until August 19, 2013, to file an answer to the Complaint. The Company intends to defend the action vigorously. The ultimate amount of any loss incurred by the Company in this matter is uncertain. The Company cannot currently estimate the likelihood it will suffer a loss greater than the amounts accrued for as of June 30, 2013. In addition to the matters set forth above, the Company is a party to various routine legal proceedings and regulatory inquiries arising out of the ordinary course of the Company’s business. Management believes that the results of these routine legal proceedings and regulatory matters will not have a material adverse effect on the Company’s financial condition, or on the Company’s operations and cash flows. However, the Company cannot estimate the legal fees and expenses to be incurred in connection with these routine matters and, therefore, is unable to determine whether these future legal fees and expenses will have a material impact on the Company’s operations and cash flows. It is the Company’s policy to expense legal and other fees as incurred. Alesco XIV Guarantee AFN invested in a CDO (Alesco XIV) in which Assured Guaranty (“Assured”) was providing credit support to the senior interests in securitizations. Alesco XIV made a loan (the “Guaranteed Loan”) to a particular borrower and AFN entered into an arrangement with Assured whereby AFN agreed to make payments to Assured upon the occurrence of both (i) a loss on the Guaranteed Loan and (ii) a loss suffered by Assured on its overall credit support arrangement to Alesco XIV security holders. This arrangement was accounted for as a guarantee by the Company. As of December 31, 2012, the Company had a liability of $1,084 related to this arrangement that was included in accounts payable and other liabilities in the Company’s consolidated balance sheets. In May 2013, the underlying loan was paid off in full by the borrower. As a result, the Company’s guarantee with Assured was extinguished. For the six and three months ended June 30, 2013, the Company recognized other income of $1,084, which was included as a component of principal transactions and other income in the Company’s consolidated statements of operations, and wrote off the liability. Accumulated Dividends and Dividend Equivalents on Restricted Stock and Restricted Units From time to time, the Company has granted restricted stock and restricted units that are entitled to receive dividends or dividend equivalents as and when such dividends or dividend equivalents are declared and paid by the Company; provided, however, that the cash dividends or dividend equivalents on such restricted stock or restricted units are held by the Company until the period of forfeiture lapses and forfeited if the underlying restricted shares or restricted units are forfeited. The Company’s potential liability, assuming the restricted stock or restricted units were to vest as of June 30, 2013, is approximately $105.

17. COMMITMENTS AND CONTINGENCIES

Legal and Regulatory Proceedings

The Company was named in litigation commenced in the United States District Court for the Southern District of New York on June 29, 2012, under the caption U.S. Bank National Association v. Institutional Financial Markets, Inc. The plaintiff, U.S. Bank, alleges breach of contract respecting certain fees allegedly owing to U.S. Bank, as Trustee, in connection with the issuance of trust preferred securities, seeking damages and a declaration that the Company must make certain future fee payments. The Company filed a motion to dismiss the complaint in lieu of an answer on October 26, 2012. U.S. Bank filed its response to the motion on November 26, 2012. On July 19, 2013, the court entered a Memorandum and Order denying the Company’s motion to dismiss. The Company has until August 19, 2013, to file an answer to the Complaint. The Company intends to defend the action vigorously. The ultimate amount of any loss incurred by the Company in this matter is uncertain. The Company cannot currently estimate the likelihood it will suffer a loss greater than the amounts accrued for as of June 30, 2013.

In addition to the matters set forth above, the Company is a party to various routine legal proceedings and regulatory inquiries arising out of the ordinary course of the Company’s business. Management believes that the results of these routine legal proceedings and regulatory matters will not have a material adverse effect on the Company’s financial condition, or on the Company’s operations and cash flows. However, the Company cannot estimate the legal fees and expenses to be incurred in connection with these routine matters and, therefore, is unable to determine whether these future legal fees and expenses will have a material impact on the Company’s operations and cash flows. It is the Company’s policy to expense legal and other fees as incurred.

Alesco XIV Guarantee

AFN invested in a CDO (Alesco XIV) in which Assured Guaranty (“Assured”) was providing credit support to the senior interests in securitizations. Alesco XIV made a loan (the “Guaranteed Loan”) to a particular borrower and AFN entered into an arrangement with Assured whereby AFN agreed to make payments to Assured upon the occurrence of both (i) a loss on the Guaranteed Loan and (ii) a loss suffered by Assured on its overall credit support arrangement to Alesco XIV security holders. This arrangement was accounted for as a guarantee by the Company. As of December 31, 2012, the Company had a liability of $1,084 related to this arrangement that was included in accounts payable and other liabilities in the Company’s consolidated balance sheets. In May 2013, the underlying loan was paid off in full by the borrower. As a result, the Company’s guarantee with Assured was extinguished. For the six and three months ended June 30, 2013, the Company recognized other income of $1,084, which was included as a component of principal transactions and other income in the Company’s consolidated statements of operations, and wrote off the liability.

Accumulated Dividends and Dividend Equivalents on Restricted Stock and Restricted Units

From time to time, the Company has granted restricted stock and restricted units that are entitled to receive dividends or dividend equivalents as and when such dividends or dividend equivalents are declared and paid by the Company; provided, however, that the cash dividends or dividend equivalents on such restricted stock or restricted units are held by the Company until the period of forfeiture lapses and forfeited if the underlying restricted shares or restricted units are forfeited. The Company’s potential liability, assuming the restricted stock or restricted units were to vest as of June 30, 2013, is approximately $105.