Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities
Net income (loss)	$ 87,137	$ 81,446
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Bad debt expense	124	668
Depreciation and amortization	2,359	1,954
(Income) loss from equity method investments	(3,897)	(3,510)
Equity-based compensation	56,313	33,337
Deferred tax provision	(1,931)	595
Other	700	484
Changes in assets and liabilities:
Accounts receivable	2,763	(11,913)
Other receivables	1,234	(1,376)
Prepaid expenses and other assets	1,342	(2,397)
Deferred compensation	(841)	(2,863)
Compensation payable	(53,017)	(62,206)
Accounts payable and accrued expenses	(7,664)	(2,233)
Deferred revenue	6,324	1,925
Dividends received	804	2,473
Other liabilities	2,075	540
Net cash provided by (used in) operating activities	93,825	36,924
Cash flows from investing activities
Purchase of investments	(95,919)	(129,984)
Proceeds from sales of investments	101,000	57,000
Return of capital from equity method investments	9	221
Notes issued to employees	(852)
Purchase of equipment and leasehold improvements	(2,737)	(2,902)
Change in restricted cash	(30)	(32)
Net cash provided by (used in) investing activities	1,471	(75,697)
Cash flows from financing activities
Dividends and distributions	(135,751)	(64,394)
Purchase of treasury stock	(2,621)	(7,006)
Excess tax benefits from equity-based compensation	90	449
Class A partnership units and other equity purchased		(90)
Net cash provided by (used in) financing activities	(138,282)	(71,041)
Effect of exchange rate fluctuations on cash and cash equivalents	(2,425)	(294)
Net increase (decrease) in cash and cash equivalents	(45,411)	(110,108)
Cash and cash equivalents, beginning of period	248,022	197,944
Cash and cash equivalents, end of period	202,611	87,836
Cash paid during the period for:
Income taxes	20,609	19,280
Other non-cash activity
Class A Partnership Units or other equity converted into Class A Common Stock	783	4,478
Dividend equivalents issued	$ 10,276	$ 2,732