Condensed Consolidated Statements of Financial Condition - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents		$ 67,046	$ 158,485
Cash collateral pledged		10,157	10,085
Securities owned, at fair value		627,767	610,234
Receivable on derivative contracts, at fair value		45,725	39,618
Other investments		166,785	140,647
Receivable from brokers		122,542	117,757
Fees receivable, net of allowance		41,172	34,413
Due from related parties		34,395	39,659
Fixed assets, net of accumulated depreciation and amortization of $29,457 and $29,953, respectively		37,684	27,231
Goodwill		58,361	58,361
Intangible assets, net of accumulated amortization of $29,438 and $28,301, respectively		24,526	25,663
Deferred tax assets, net		146,459	143,560
Other assets		43,442	71,531
Consolidated Funds
Cash and cash equivalents		12,348	13,934
Securities owned, at fair value		40,523	32,000
Receivable on derivatives		125	0
Other investments		394,478	263,818
Other assets		1,401	663
Total Assets		1,874,936	1,787,659
Liabilities
Securities sold, not yet purchased, at fair value		412,810	257,159
Payable for derivative contracts, at fair value		25,134	21,183
Payable to brokers		23,837	131,789
Compensation payable		26,262	150,403
Notes payable and other debt		90,081	68,565
Convertible debt	[1]	124,251	122,401
Fees payable		1,746	5,638
Due to related parties		234	329
Accounts Payable, Accrued Expenses and Other Liabilities		55,607	52,233
Consolidated Funds
Due to related parties		1	3
Contributions received in advance		2,600	850
Securities sold, not yet purchased, Consolidated Funds		1,367	0
Payable for derivatives		2	0
Payable to brokers		2,315	0
Capital withdrawals payable		0	78
Accounts payable, accrued expenses and other liabilities		831	124
Total Liabilities		$ 767,078	$ 810,755
Commitments and Contingencies
Redeemable non-controlling interests		$ 324,938	$ 186,911
Stockholders' equity
Additional paid-in capital		908,462	902,554
(Accumulated deficit) retained earnings		18,231	23,627
Accumulated other comprehensive income (loss)		(3)	0
Less: Class A common stock held in treasury, at cost, 36,638,529 and 34,515,734 shares as of March 31, 2016 and December 31, 2015, respectively.		(144,938)	(137,356)
Total Stockholders' Equity		782,920	789,993
Total Liabilities and Stockholders' Equity		1,874,936	1,787,659
Convertible Preferred Stock
Stockholders' equity
Preferred stock		1	1
Common Stock Class A
Stockholders' equity
Common stock		1,167	1,167
Less: Class A common stock held in treasury, at cost, 36,638,529 and 34,515,734 shares as of March 31, 2016 and December 31, 2015, respectively.		(144,938)	(137,356)
Common Stock Class B
Stockholders' equity
Common stock		$ 0	$ 0

[1] The carrying amount of the convertible debt includes an unamortized discount of $23.1 million and $24.7 million as of March 31, 2016 and December 31, 2015.