XML 46 R62.htm IDEA: XBRL DOCUMENT v2.4.0.8
Significant Accounting Policies Revenue Recognition (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Revenue from External Customer [Line Items]      
Commissions $ 79.7 $ 63.0 $ 66.0
Principal transactions, net 28.1 22.5 27.1
Equity research fees $ 6.8 $ 5.7 $ 6.5
Managed mutual funds [Member] | Maximum
     
Revenue from External Customer [Line Items]      
Management Fees, Percent Fee 2.00%    
Managed mutual funds [Member] | Minimum
     
Revenue from External Customer [Line Items]      
Management Fees, Percent Fee 1.60%    
Hedge Funds [Member] | Maximum
     
Revenue from External Customer [Line Items]      
Management Fees, Percent Fee 2.00%    
Alternative Solutions [Member] | Maximum
     
Revenue from External Customer [Line Items]      
Management Fees, Percent Fee 2.00%    
Real Estate Funds | Maximum
     
Revenue from External Customer [Line Items]      
Management Fees, Percent Fee 1.50%    
Real Estate Funds | Minimum
     
Revenue from External Customer [Line Items]      
Management Fees, Percent Fee 0.75%    
Cash management [Member] | Maximum
     
Revenue from External Customer [Line Items]      
Management Fees, Percent Fee 0.20%    
During investment period [Member] | Healthcare Royalty Partners
     
Revenue from External Customer [Line Items]      
Management Fees, Percent Fee 2.00%    
After investment period [Member] | Healthcare Royalty Partners
     
Revenue from External Customer [Line Items]      
Management Fees, Percent Fee 2.00%    
Commodity trading advisory [Member] | Ramius Trading Strategies Managed Futures Fund [Member] | Maximum
     
Revenue from External Customer [Line Items]      
Management Fees, Percent Fee 1.00%    
Hedge Funds [Member]
     
Revenue from External Customer [Line Items]      
Incentive Fees, Percent Fee 20.00%    
Alternative Solutions [Member]
     
Revenue from External Customer [Line Items]      
Incentive Fees, Percent Fee 10.00%