Condensed Consolidated Statements of Financial Condition (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 66,218	$ 126,889
Cash collateral pledged	9,738	9,785
Securities owned, at fair value	790,665	744,914
Securities purchased under agreements to resell	131,007	166,260
Other investments	66,351	61,929
Receivable from brokers	66,824	62,046
Fees receivable	18,980	22,297
Due from related parties	17,278	16,554
Fixed assets, net of accumulated depreciation and amortization of $25,466 and $23,852, respectively	35,829	37,042
Goodwill	20,028	20,028
Intangible assets, net of accumulated amortization of $20,718 and $20,220, respectively	5,262	5,760
Other assets	26,241	26,620
Cash and cash equivalents, Consolidated Funds	2,555	297
Securities owned, at fair value, Consolidated Funds	2,574	6,334
Other investments, at fair value, Consolidated Funds	231,478	228,820
Other assets, Consolidated Funds	464	263
Total Assets	1,491,492	1,535,838
Liabilities and Stockholders' Equity
Securities sold, not yet purchased, at fair value	319,667	334,251
Securities sold under agreement to repurchase	294,191	228,783
Payable to brokers	165,046	213,360
Compensation payable	19,349	71,223
Short-term borrowings and other debt	5,275	5,650
Fees payable	8,637	5,503
Due to related parties	987	1,914
Accounts payable, accrued expenses and other liabilities	57,095	61,462
Capital withdrawals payable, Consolidated Funds	67	394
Accounts payable, accrued expenses and other liabilities, Consolidated Funds	253	246
Total Liabilities	870,567	922,786
Commitments and Contingencies (Note 12)
Redeemable non-controlling interests	103,429	104,587
Stockholders' Equity
Preferred stock	0	0
Additional paid-in capital	694,371	688,427
(Accumulated deficit) retained earnings	(159,985)	(163,980)
Accumulated other comprehensive income (loss)	(175)	(215)
Less: Class A common stock held in treasury, at cost	(17,850)	(16,902)
Total Stockholders' Equity	517,496	508,465
Liabilities and Stockholders' equity	1,491,492	1,535,838
Common Stock Class A
Stockholders' Equity
Common stock	1,135	1,135
Common Stock Class B
Stockholders' Equity
Common stock	$ 0	$ 0