Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating Activities
Net Income Including the Noncontrolling Interests in Subsidiaries	$ 192,036	$ 160,667
Adjustments to Reconcile Net Income to Net Cash Provided (Used) by Operating Activities
Amortization of Deferred Sales Commissions	1,625	2,319
Depreciation and Other Amortization	19,165	10,767
Share-Based Compensation Expense	19,148	18,244
Subsidiary Share-Based Compensation Expense	6,024	0
(Gain) Loss on Disposal of Assets	11	(7)
Provision (Benefit) for Deferred Income Taxes	5,956	7,813
Net Unrealized (Gain) Loss on Investments	(3,469)	1,801
Net Sales (Purchases) of Investments—Consolidated Investment Companies	(20,076)	9,302
(Increase) Decrease in Receivables, net	426	(9,462)
(Increase) Decrease in Prepaid Expenses and Other Assets	(1,502)	(1,052)
Increase (Decrease) in Accounts Payable and Accrued Expenses	(4,057)	(119,268)
Increase (Decrease) in Other Liabilities	(2,946)	7,589
Net Cash Provided (Used) by Operating Activities	212,341	88,713
Investing Activities
Purchases of Investments—Affiliates and Other	(88,422)	(3,081)
Cash Paid for Business Acquisitions, Net of Cash Acquired	785	(168,430)
Proceeds from Redemptions of Investments—Affiliates and Other	32,639	19,986
Cash Paid for Property and Equipment	(11,321)	(11,900)
Net Cash Provided (Used) by Investing Activities	(66,319)	(163,425)
Financing Activities
Dividends Paid	(81,869)	(79,808)
Purchases of Treasury Stock	(4,054)	(27,064)
Distributions to Noncontrolling Interest in Subsidiaries	(3,188)	(9,778)
Contributions from Noncontrolling Interest in Subsidiaries	2,551	4,425
Proceeds from Shareholders for Share-Based Compensation	193	222
Proceeds from New Borrowings	8,800	79,150
Payments on Contingent Consideration Liabilities	0	(228)
Payments on Debt	(23,800)	(89,150)
Net Cash Provided (Used) by Financing Activities	(101,367)	(122,231)
Effect of Exchange Rates on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(3,569)	(2,343)
Net Increase (Decrease) in Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	41,086	(199,286)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning of Period	157,426	316,809
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	198,512	117,523
Less: Restricted Cash Recorded in Other Current Assets	1,671	0
Less: Restricted Cash and Restricted Cash Equivalents Recorded in Other Long-Term Assets	328	580
Cash and Cash Equivalents	$ 196,513	$ 116,943