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Permanent Equity Operating LLC Membership Units) (Details) | 12 Months Ended |  |  |  |  | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 IFMI, LLC [Member] | Dec. 31, 2012 IFMI, LLC [Member] | Dec. 31, 2011 IFMI, LLC [Member] | Dec. 31, 2013 IFMI, LLC [Member] Institutional Financial Markets, Inc. [Member] | Dec. 31, 2012 IFMI, LLC [Member] Institutional Financial Markets, Inc. [Member] | Dec. 31, 2011 IFMI, LLC [Member] Institutional Financial Markets, Inc. [Member] | Dec. 31, 2013 IFMI, LLC [Member] Daniel G. Cohen [Member] | Dec. 31, 2012 IFMI, LLC [Member] Daniel G. Cohen [Member] | Dec. 31, 2011 IFMI, LLC [Member] Daniel G. Cohen [Member] | Dec. 31, 2010 IFMI, LLC [Member] Daniel G. Cohen [Member] | Dec. 31, 2013 IFMI, LLC [Member] Other Unit Holders [Member] | Dec. 31, 2012 IFMI, LLC [Member] Other Unit Holders [Member] | Dec. 31, 2011 IFMI, LLC [Member] Other Unit Holders [Member] | Dec. 31, 2013 IFMI, LLC [Member] Unit Issuance And Surrender Agreement [Member] | Dec. 31, 2012 IFMI, LLC [Member] Unit Issuance And Surrender Agreement [Member] | Dec. 31, 2011 IFMI, LLC [Member] Unit Issuance And Surrender Agreement [Member] | Dec. 31, 2013 IFMI, LLC [Member] Unit Issuance And Surrender Agreement [Member] Institutional Financial Markets, Inc. [Member] | Dec. 31, 2012 IFMI, LLC [Member] Unit Issuance And Surrender Agreement [Member] Institutional Financial Markets, Inc. [Member] | Dec. 31, 2011 IFMI, LLC [Member] Unit Issuance And Surrender Agreement [Member] Institutional Financial Markets, Inc. [Member] | Dec. 31, 2013 IFMI, LLC [Member] JVB Holdings Agreement [Member] | Dec. 31, 2012 IFMI, LLC [Member] JVB Holdings Agreement [Member] | Dec. 31, 2011 IFMI, LLC [Member] JVB Holdings Agreement [Member] | Dec. 31, 2011 IFMI, LLC [Member] JVB Holdings Agreement [Member] Institutional Financial Markets, Inc. [Member] | Dec. 31, 2013 IFMI, LLC [Member] Private Placement [Member] | Dec. 31, 2013 IFMI, LLC [Member] Private Placement [Member] Institutional Financial Markets, Inc. [Member]
Permanent Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, Shares |  |  |  |  | 16,457,628 | 15,500,011 | 15,626,903 | 11,133,538 | 10,248,009 | 10,343,347 | 4,983,557 | 4,983,557 | 4,983,557 | 4,983,557 | 340,533 | 268,445 | 299,999 |  |  |  |  |  |  |  |  |  |  |  |
Membership Units Received Net Of Surrenders | 2,749,167 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 502,614 | 705,083 | 259,212 | 502,614 | 705,083 | 259,212 |  |  | 313,051 | 313,051 | 2,749,167 | 2,749,167
Redemption of Operating LLC Units |  |  |  |  |  |  | (31,554) | 186,339 | 230,846 |  |  |  |  |  | (186,339) | (230,846) | (31,554) |  |  |  |  |  |  |  |  |  |  |  |
Vesting of units | 90,135 | [1] |  |  | 186,339 | 302,934 |  |  |  |  |  |  |  |  | 186,339 | 302,934 |  |  |  |  |  |  |  | 186,339 | 186,339 |  |  |  |
Retirement of treasury stock |  |  | (50,400) | (667,601) |  | (50,400) | (667,601) |  | (50,400) | (667,601) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, Shares |  |  |  |  | 19,895,748 | 16,457,628 | 15,500,011 | 14,571,658 | 11,133,538 | 10,248,009 | 4,983,557 | 4,983,557 | 4,983,557 | 4,983,557 | 340,533 | 340,533 | 268,445 |  |  |  |  |  |  |  |  |  |  |  |
[1] | Vesting includes 90,135 of unvested restricted units of IFMI Common Stock. See note 20.

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- Definition Membership Units Received Net Of Surrenders + References No definition available. + Details
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- Details
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- Definition Represents the number of shares from equity based awards that vested during the period. + References No definition available. + Details
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- Definition Number of stock bought back by the entity at the exercise price or redemption price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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- Definition Number of shares of common and preferred stock retired from treasury during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 + Details
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