Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash Flows From Operating Activities
Net Income	$ 174,857	$ 134,402
Adjustments to Reconcile Net Income to Net Cash Provided by (Used In) Operating Activities:
Net (Gains) Losses on Investments, Investment Securities and Contingent Consideration	(20,757)	(23,856)
Equity Method Investments	176	1,437
Equity-Based and Other Deferred Compensation	288,412	272,363
Noncash Lease Expense	19,886	21,377
Depreciation, Amortization and Accretion, net	1,079	6,109
Bad Debt Expense	971	5,297
Deferred Taxes	(606)	(9,232)
Decrease (Increase) in Operating Assets:
Investment Securities	16,214	3,105
Accounts Receivable	8,475	60,781
Receivable from Employees and Related Parties	72	3,092
Other Assets	19,923	38,497
(Decrease) Increase in Operating Liabilities:
Accrued Compensation and Benefits	(475,693)	(715,222)
Accounts Payable and Accrued Expenses	8,973	2,637
Payables to Employees and Related Parties	21,489	5,534
Taxes Payable	(3,193)	(4,138)
Other Liabilities	6,989	(7,732)
Net Cash Provided by (Used in) Operating Activities	67,267	(205,549)
Cash Flows From Investing Activities
Investments Purchased	0	(37)
Distributions of Private Equity Investments	0	72
Investment Securities:
Proceeds from Sales and Maturities of Investment Securities	1,633,347	2,227,084
Purchases of Investment Securities	(1,179,299)	(1,804,833)
Maturity of Certificates of Deposit	54,462	124,728
Purchase of Certificates of Deposit	(115,814)	(54,267)
Purchase of Furniture, Equipment and Leasehold Improvements	(8,918)	(12,374)
Net Cash Provided by Investing Activities	383,778	480,373
Cash Flows From Financing Activities
Issuance of Noncontrolling Interests	85	733
Distributions to Noncontrolling Interests	(15,973)	(15,651)
Payments Under Tax Receivable Agreement	(607)	0
Purchase of Treasury Stock and Noncontrolling Interests	(320,347)	(348,264)
Dividends	(74,145)	(70,279)
Net Cash Provided by (Used in) Financing Activities	(410,987)	(433,461)
Effect of Exchange Rate Changes on Cash	(5,084)	15,988
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	34,974	(142,649)
Cash, Cash Equivalents and Restricted Cash – Beginning of Period	605,484	672,123
Cash, Cash Equivalents and Restricted Cash – End of Period	640,458	529,474
SUPPLEMENTAL CASH FLOW DISCLOSURE
Payments for Interest	8,096	8,099
Payments for Income Taxes	46,212	54,874
Accrued Dividends	$ 8,030	$ 8,659