Net Capital Requirements (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013
Gleacher Securities
Net Capital Requirements
Minimum net capital under the alternative method	$ 80.1
Excess net capital	79.8
Required minimum net capital	0.25
Gleacher Partners, LLC
Net Capital Requirements
Minimum net capital under the alternative method	0.8
Excess net capital	0.5
Required minimum net capital	$ 0.25