Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating Activities
Net Income Including the Noncontrolling Interests in Subsidiaries	$ 234,750	$ 192,036
Adjustments to Reconcile Net Income to Net Cash Provided (Used) by Operating Activities
Amortization of Deferred Sales Commissions	1,090	1,625
Depreciation and Other Amortization	21,341	19,165
Share-Based Compensation Expense	20,224	19,148
Subsidiary Share-Based Compensation Expense	6,404	6,024
(Gain) Loss on Disposal of Assets	1,590	11
Provision (Benefit) for Deferred Income Taxes	11,907	5,956
Consolidation/(Deconsolidation) of Investment Companies	(3,051)	0
Net Unrealized (Gain) Loss on Investments	(5,397)	(3,469)
Net Sales (Purchases) of Investments—Consolidated Investment Companies	(7,516)	(20,076)
Other Changes in Assets and Liabilities:
(Increase) Decrease in Receivables, net	5,998	426
(Increase) Decrease in Prepaid Expenses and Other Assets	(9,317)	(1,502)
Increase (Decrease) in Accounts Payable and Accrued Expenses	(27,411)	(4,057)
Increase (Decrease) in Other Liabilities	(7,154)	(2,946)
Net Cash Provided (Used) by Operating Activities	243,458	212,341
Investing Activities
Purchases of Investments—Affiliates and Other	(19,050)	(88,422)
Cash Paid for Business Acquisitions, Net of Cash Acquired	2,697	785
Proceeds from Redemptions of Investments—Affiliates and Other	6,415	32,639
Cash Paid for Property and Equipment	(8,559)	(11,321)
Net Cash Provided (Used) by Investing Activities	(18,497)	(66,319)
Financing Activities
Dividends Paid	(81,612)	(81,869)
Purchases of Treasury Stock	(53,145)	(4,054)
Distributions to Noncontrolling Interest in Subsidiaries	(10,455)	(3,188)
Contributions from Noncontrolling Interest in Subsidiaries	15,014	2,551
Proceeds from New Borrowings	100,000	8,800
Payments on Debt	(110,000)	(23,800)
Other Financing Activities	(1,616)	193
Net Cash Provided (Used) by Financing Activities	(141,814)	(101,367)
Effect of Exchange Rates on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(3,408)	(3,569)
Net Increase (Decrease) in Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	79,739	41,086
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning of Period	249,511	157,426
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	329,250	198,512
Less: Restricted Cash Recorded in Other Current Assets	6,091	1,671
Less: Restricted Cash and Restricted Cash Equivalents Recorded in Other Long-Term Assets	312	328
Cash and Cash Equivalents	$ 322,847	$ 196,513