Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Net income (loss)	$ (27,516)	$ 168,682	$ 422,978
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Bad debt expense (benefit)	1,099	2,630	2,026
Depreciation and amortization	8,317	7,975	7,242
Equity-based compensation	158,189	128,938	167,938
Deferred tax provision	(4,292)	26,786	22,862
Other	(11,371)	9,197	(36,342)
Changes in assets and liabilities:
Accounts receivable	(4,014)	(20,320)	26,941
Accrued and other receivables	(3,900)	22,026	(14,721)
Prepaid expenses and other assets	5,317	(14,987)	(3,396)
Deferred compensation	(1,957)	(3,762)	505
Compensation payable	14,889	(255,291)	282,872
Accounts payable, accrued expenses and other liabilities	23,744	(45,043)	52,874
Deferred revenue	(3,125)	3,227	1,845
Dividends received	3,092	2,936	3,356
Net cash provided by (used in) operating activities	158,472	32,994	936,980
Cash flows from investing activities
Purchases of investments	(210,579)	(334,743)	(486,124)
Proceeds from sales of investments	275,848	332,517	456,302
Note payments received from (issued to) employees		(3,000)	70
Purchases of equipment and leasehold improvements	(16,695)	(5,957)	(16,426)
Proceeds from partial sale of equity method investment			29,164
Net cash provided by (used in) investing activities	48,574	(11,183)	(17,014)
Cash flows from financing activities
Payments for dividends and tax distributions	(182,156)	(174,651)	(479,963)
Payments for treasury stock purchases	(47,002)	(147,537)	(104,150)
Payments under tax receivable agreement		(6,613)	(18,628)
Other proceeds	(15)	1,900	200
Net cash provided by (used in) financing activities	(229,173)	(326,901)	(602,541)
Effect of exchange rate fluctuations on cash, cash equivalents, and restricted cash	1,803	(8,385)	305
Net increase (decrease) in cash, cash equivalents, and restricted cash	(20,324)	(313,475)	317,730
Cash, cash equivalents, and restricted cash, beginning of period	207,539	521,014	203,284
Cash, cash equivalents, and restricted cash, end of period	187,215	207,539	521,014
Cash paid (received) during the period for:
Income taxes, net	(3,625)	76,422	55,189
Other non-cash activity
Class A Partnership Units or other equity converted into Class A Common Stock	704	7,478	26,964
Dividends in kind	21,857	20,804	63,374
Non-cash settlement of accounts receivable		$ 10,802	18,550
Settlement of partnership units not yet paid			118
Forfeiture of fully-vested Group LP units or other equity units	$ 889		$ 25