v2.4.0.6
Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Revenues:    
Trading gains $ 18,994 $ 137,280
Commissions and execution fees 119,538 100,885
Interest income 70,502 66,576
Other income 19,911 18,324
Total revenues 228,945 323,065
Interest expense 12,871 19,143
Total net revenues 216,074 303,922
Non-interest expenses:    
Execution and clearing 59,540 64,624
Employee compensation and benefits 46,318 62,725
Occupancy, depreciation and amortization 10,069 9,934
Communications 5,453 5,674
General and administrative 12,471 11,288
Total non-interest expenses 133,851 154,245
Income before income taxes 82,223 149,677
Income tax expense 6,935 8,734
Net income 75,288 140,943
Less net income attributable to noncontrolling interests 68,731 129,859
Net income attributable to common stockholders 6,557 11,084
Earnings per share:    
Basic $ 0.14 $ 0.27
Diluted $ 0.14 $ 0.27
Weighted average common shares outstanding:    
Basic 47,499,898 45,576,925
Diluted 47,688,314 45,951,464
Comprehensive income:    
Net income attributable to common stockholders 6,557 11,084
Other comprehensive income:    
Cumulative translation adjustment, before income taxes (3,735) 4,110
Income taxes related to items of other comprehensive income 7 1,484
Other comprehensive income (loss), net of tax (3,742) 2,626
Comprehensive income attributable to common stockholders 2,815 13,710
Comprehensive income attributable to noncontrolling interests:    
Net income attributable to noncontrolling interests 68,731 129,859
Other comprehensive income (loss) - cumulative translation adjustment (27,621) 31,551
Comprehensive income attributable to noncontrolling interests $ 41,110 $ 161,410