Net Capital Requirements (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012
Net Capital Requirements (Textual) [Abstract]
Minimum net liquid capital required	$ 1,708
Cohen & Company Securities, LLC [Member]
Net Capital Requirements (Textual) [Abstract]
Adjusted net capital	3,463
Amount in excess of minimum capital requirement	3,363
JVB's [Member]
Net Capital Requirements (Textual) [Abstract]
Adjusted net capital	9,803
Amount in excess of minimum capital requirement	9,681
PrinceRidge Group LLC [Member]
Net Capital Requirements (Textual) [Abstract]
Adjusted net capital	17,107
Amount in excess of minimum capital requirement	16,857
EuroDekania Management Limited [Member]
Net Capital Requirements (Textual) [Abstract]
Amount in excess of minimum capital	3,767
Net liquid capital	$ 5,475