Condensed Consolidated Statements of Financial Condition - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents		$ 76,925	$ 158,485
Cash collateral pledged		13,783	10,085
Securities owned, at fair value		544,644	610,234
Receivable on derivative contracts, at fair value		27,428	39,618
Other investments		167,450	140,647
Receivable from brokers		77,631	117,757
Fees receivable, net of allowance		45,787	34,413
Due from related parties		32,539	39,659
Fixed assets, net of accumulated depreciation and amortization of $24,170 and $29,953, respectively		43,463	27,231
Goodwill		60,678	58,361
Intangible assets, net of accumulated amortization of $28,114 and $28,301, respectively		27,073	25,663
Deferred tax assets, net		151,237	143,560
Other assets		53,081	71,531
Consolidated Funds
Cash and cash equivalents		10,370	13,934
Securities owned, at fair value		71,456	32,000
Receivable on derivatives		429	0
Other investments		391,872	263,818
Receivable from brokers		5,333	0
Other assets		999	663
Total Assets		1,802,178	1,787,659
Liabilities
Securities sold, not yet purchased, at fair value		212,183	257,159
Payable for derivative contracts, at fair value		17,021	21,183
Payable to brokers		127,216	131,789
Compensation payable		59,103	150,403
Notes payable and other debt		78,357	68,565
Convertible debt	[1]	128,065	122,401
Fees payable		6,637	5,638
Due to related parties		257	329
Accounts payable, accrued expenses and other liabilities		62,496	52,233
Consolidated Funds
Due to related parties		0	3
Contributions received in advance		0	850
Securities sold, not yet purchased, at fair value		1,540	0
Payable to brokers		3,132	0
Payable for derivatives		276	0
Capital withdrawals payable		2,378	78
Accounts payable, accrued expenses and other liabilities		410	124
Total Liabilities		699,071	810,755
Commitments and Contingencies
Redeemable non-controlling interests		331,883	186,911
Stockholders' equity
Additional paid-in capital		921,062	902,554
(Accumulated deficit) retained earnings		1,160	23,627
Accumulated other comprehensive income (loss)		(3)	0
Less: Class A common stock held in treasury, at cost, 38,817,672 and 34,515,734 shares as of September 30, 2016 and December 31, 2015, respectively.		(152,163)	(137,356)
Total Stockholders' Equity		771,224	789,993
Total Liabilities and Stockholders' Equity		1,802,178	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, 38,817,672 and 34,515,734 shares as of September 30, 2016 and December 31, 2015, respectively.		(152,163)	(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 $19.6 million and $24.7 million as of September 30, 2016 and December 31, 2015.