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Permanent Equity Operating LLC Membership Units) (Details)
 12 Months Ended 12 Months Ended
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.