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Business Information
 9 Months Ended
Sep. 30, 2013
Segment Reporting [Abstract]  
Business Information
Business Information
The Company's activities as an investment banking firm constitute one business segment, with two principal sources of revenue:
•
    Advisory, which includes engagements relating to mergers and acquisitions, financing advisory and restructuring, and private equity and real estate capital advisory services; and
•
Investment, which includes the Company's principal investments in merchant banking funds, Iridium and other investments and interest.  
The following provides a breakdown of our revenues by source for the three and nine month periods ended September 30, 2013 and 2012, respectively:
 
For the Three Months Ended  
 
September 30, 2013
 
September 30, 2012
 
Amount 
% of Total
 
Amount 
% of Total 
 
(in millions, unaudited)
Advisory revenues
$47.0
 
105
 %
 
$72.7
 
116
 %
Investment revenues
(2.4
)
 
(5
)%
 
(10.0
)
 
(16
)%
Total revenues
$44.6
 
100
 %
 
$62.7
 
100
 %
 
For the Nine Months Ended 
 
September 30, 2013
 
September 30, 2012
 
Amount  
% of Total 
 
Amount 
% of Total 
 
(in millions, unaudited)
Advisory revenues
$211.5
 
100
 %
 
$191.2
 
99
%
Investment revenues
(0.7
)
 
—
 %
 
1.6

 
1
%
Total revenues
$210.8
 
100
 %
 
$192.8
 
100
%

In reporting to management, the Company distinguishes the sources of its revenues between advisory and investment revenues. However, management does not evaluate other financial data or operating results such as operating expenses, profit and loss or assets by its advisory and investment activities.