Condensed Consolidated Statements of Financial Condition (USD $)	Dec. 31, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 54,720,000	$ 83,538,000
Cash collateral pledged	10,907,000	9,160,000
Securities owned, at fair value	320,737,000	624,127,000
Securities borrowed	927,773,000	406,326,000
Other investments	99,483,000	84,930,000
Receivable from brokers	66,980,000	71,306,000
Fees receivable, net of allowance	45,067,000	34,707,000
Due from related parties	26,910,000	21,022,000
Fixed assets, net of accumulated depreciation and amortization of $21,853 and $30,003, respectively	26,999,000	32,202,000
Goodwill	37,240,000	28,545,000
Intangible assets, net of accumulated amortization of $26,610 and $22,945, respectively	12,094,000	12,984,000
Other assets	17,938,000	18,048,000
Consolidated Funds
Cash and cash equivalents	2,048,000	3,559,000
Securities owned, at fair value	0	3,525,000
Other investments, at fair value	187,480,000	204,205,000
Other assets	5,624,000	292,000
Total Assets	1,842,000,000	1,638,476,000
Liabilities
Securities sold, not yet purchased, at fair value	137,527,000	177,937,000
Securities sold under agreement to repurchase	3,657,000	165,945,000
Securities loaned	918,577,000	408,972,000
Payable to brokers	75,420,000	188,788,000
Compensation payable	51,807,000	45,752,000
Short-term borrowings and other debt	2,564,000	4,132,000
Fees payable	6,324,000	5,277,000
Due to related parties	382,000	662,000
Accounts Payable, Accrued Expenses and Other Liabilities	46,391,000	56,894,000
Consolidated Funds
Capital withdrawals payable	5,222,000	2,891,000
Accounts payable, accrued expenses and other liabilities	549,000	414,000
Total Liabilities	1,248,420,000	1,057,664,000
Commitments and Contingencies (Note 19)
Redeemable non-controlling interests	85,814,000	85,703,000
Stockholders' equity
Preferred stock, par value $0.01 per share; 10,000,000 shares authorized, no shares issued and outstanding	0	0
Additional paid-in capital	737,341,000	713,211,000
(Accumulated deficit) retained earnings	(183,243,000)	(187,865,000)
Accumulated other comprehensive income (loss)	592,000	356,000
Less: Class A common stock held in treasury, at cost, 15,873,549 and 11,292,220 shares as of December 31, 2013 and December 31, 2012, respectively.	(48,100,000)	(31,728,000)
Total Stockholders' Equity	507,766,000	495,109,000
Total Liabilities and Stockholders' Equity	1,842,000,000	1,638,476,000
Common Stock Class A
Stockholders' equity
Common stock	1,160,000	1,135,000
Less: Class A common stock held in treasury, at cost, 15,873,549 and 11,292,220 shares as of December 31, 2013 and December 31, 2012, respectively.	(48,084,000)	(31,728,000)
Common Stock Class B
Stockholders' equity
Common stock	$ 0	$ 0