Condensed Consolidated Statements of Financial Condition - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents		$ 158,485	$ 129,509
Cash collateral pledged		10,085	8,306
Securities owned, at fair value		610,234	792,206
Receivable on derivative contracts, at fair value		39,618	49,877
Securities borrowed		0	676,100
Other investments		140,647	167,464
Receivable from brokers		117,757	84,679
Fees receivable, net of allowance		34,413	46,498
Due from related parties		39,659	26,315
Fixed assets, net of accumulated depreciation and amortization of $29,953 and $25,968, respectively		27,231	26,388
Goodwill		58,361	34,906
Intangible assets, net of accumulated amortization of $28,301 and $25,581, respectively		25,663	8,483
Deferred tax assets, net		143,560	129,400
Other assets		76,326	34,230
Consolidated Funds
Cash and cash equivalents		13,934	501
Securities owned, at fair value		32,000	0
Other investments		263,818	189,377
Other assets		663	1,437
Total Assets		1,792,454	2,405,676
Liabilities
Securities sold, not yet purchased, at fair value		257,159	207,875
Payable for derivative contracts, at fair value		21,183	41,330
Securities loaned		0	682,493
Payable to brokers		131,789	335,822
Compensation payable		150,403	134,289
Notes payable and other debt		70,984	67,144
Convertible debt	[1]	124,777	118,475
Fees payable		5,638	6,331
Due to related parties		329	474
Accounts Payable, Accrued Expenses and Other Liabilities		52,233	46,606
Consolidated Funds
Due to related parties		3	0
Contributions received in advance		850	0
Capital withdrawals payable		78	864
Accounts payable, accrued expenses and other liabilities		124	222
Total Liabilities		$ 815,550	$ 1,641,925
Commitments and Contingencies
Redeemable non-controlling interests		$ 186,911	$ 86,076
Stockholders' equity
Additional paid-in capital		902,554	772,296
(Accumulated deficit) retained earnings		23,627	(16,027)
Accumulated other comprehensive income (loss)		0	17
Less: Class A common stock held in treasury, at cost, 34,515,734 and 23,507,656 shares as of December 31, 2015 and December 31, 2014, respectively.		(137,356)	(79,771)
Total Stockholders' Equity		789,993	677,675
Total Liabilities and Stockholders' Equity		1,792,454	2,405,676
Convertible Preferred Stock
Stockholders' equity
Preferred stock		1	0
Common Stock Class A
Stockholders' equity
Common stock		1,167	1,160
Less: Class A common stock held in treasury, at cost, 34,515,734 and 23,507,656 shares as of December 31, 2015 and December 31, 2014, respectively.		(137,356)	(79,771)
Common Stock Class B
Stockholders' equity
Common stock		$ 0	$ 0

[1] The carrying amount of the convertible debt includes an unamortized discount of $24.7 million and $31.0 million as of December 31, 2015 and 2014.