Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities
Net income (loss)	$ 51,824	$ 46,816
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Bad debt expense	450	298
Depreciation and amortization	1,542	1,308
(Income) loss from equity method investments	(2,335)	(3,060)
Equity-based compensation	38,706	20,518
Deferred tax provision	(774)	1,092
Other	80	(3)
Changes in assets and liabilities:
Accounts receivable	1,444	726
Other receivables	(92)	(5,204)
Prepaid expenses and other assets	(116)	(1,797)
Deferred compensation	(1,788)	(1,121)
Compensation payable	(75,900)	(89,844)
Accounts payable and accrued expenses	(4,014)	(2,285)
Deferred revenue	2,353	2,778
Dividends received	804	985
Other liabilities	2,252	413
Net cash provided by (used in) operating activities	14,436	(28,380)
Cash flows from investing activities
Purchase of investments	(70,928)	(26,994)
Proceeds from sales of investments	46,000	39,999
Notes issued to employees	(352)
Purchase of equipment and leasehold improvements	(2,286)	(2,102)
Return of capital from equity method investments	9	109
Change in restricted cash	21	(68)
Net cash provided by (used in) investing activities	(27,536)	10,944
Cash flows from financing activities
Dividends and distributions	(117,910)	(47,754)
Purchase of treasury stock	(2,609)	(5,953)
Class A partnership units and other equity purchased		(90)
Excess tax benefits from equity-based compensation	90
Net cash provided by (used in) financing activities	(120,429)	(53,797)
Effect of exchange rate fluctuations on cash and cash equivalents	(1,366)	924
Net increase (decrease) in cash and cash equivalents	(134,895)	(70,309)
Cash and cash equivalents, beginning of period	248,022	197,944
Cash and cash equivalents, end of period	113,127	127,635
Cash paid during the period for:
Income taxes	14,719	11,904
Other non-cash activity
Class A Partnership Units or other equity converted into Class A Common Stock	783	3,644
Dividend equivalents issued	$ 7,774	$ 1,339