Quarterly report pursuant to Section 13 or 15(d)

Segment Information - Segment Information (Parenthetical) (Details)

v2.4.0.8
Segment Information - Segment Information (Parenthetical) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Segment Reporting Information [Line Items]        
Commissions $ 106,346 $ 98,971 $ 206,945 $ 192,038
Series A Preferred Stock
       
Segment Reporting Information [Line Items]        
Commissions       5,148
Series A Preferred Stock | Employee brokerage commission expenses
       
Segment Reporting Information [Line Items]        
Commissions       2,603
Series A Preferred Stock | Ladenburg
       
Segment Reporting Information [Line Items]        
Commissions       4,240
Series A Preferred Stock | Ladenburg | Employee brokerage commission expenses
       
Segment Reporting Information [Line Items]        
Commissions       2,545
Series A Preferred Stock | Independent brokerage and advisory services
       
Segment Reporting Information [Line Items]        
Commissions       $ 908