CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net Income Including the Noncontrolling Interests in Subsidiaries	$ 272,308	$ 336,022	$ 277,125
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Depreciation and Other Amortization	30,010	29,932	27,999
Share-Based Compensation Expense	30,294	26,669	25,057
Subsidiary Share-Based Compensation Expense	9,411	8,786	7,888
(Gain) Loss on Disposal of Assets	(6,964)	1,382	(1,085)
Provision (Benefit) for Deferred Income Taxes	19,033	18,169	7,452
Net Unrealized (Gain) Loss on Investments	(1,965)	(19,403)	(6,915)
Net Sales (Purchases) of Investments—Consolidated Investment Companies	(179,419)	(12,978)	(26,434)
Consolidation/(Deconsolidation) of Investment Companies	10,379	(3,051)	0
Other Changes in Assets and Liabilities:
(Increase) Decrease in Receivables, net	6,662	11,654	(7,250)
(Increase) Decrease in Prepaid Expenses and Other Assets	10,275	(33,588)	7,411
Increase (Decrease) in Accounts Payable and Accrued Expenses	(6,365)	695	30,912
Increase (Decrease) in Other Liabilities	(23,276)	8,952	(7,220)
Net Cash Provided (Used) by Operating Activities	170,383	373,241	334,940
Investing Activities
Purchases of Investments—Affiliates and Other	(9,429)	(25,513)	(103,445)
Cash Paid for Business Acquisitions, net of Cash Acquired	0	2,697	785
Cash Paid for Asset Acquisitions	(5,324)	0	(58,046)
Proceeds from Redemptions of Investments—Affiliates and Other	35,990	11,493	81,068
Cash Paid for Property and Equipment	(10,421)	(13,500)	(15,045)
Net Cash Provided (Used) by Investing Activities	10,816	(24,823)	(94,683)
Financing Activities
Dividends Paid	(105,764)	(207,765)	(109,147)
Purchases of Treasury Stock	(228,349)	(66,759)	(15,740)
Distributions to Noncontrolling Interests in Subsidiaries	(4,926)	(16,218)	(3,580)
Contributions from Noncontrolling Interests in Subsidiaries	107,635	20,985	9,356
Payments to Acquire Additional Equity in HFML	(165,886)	0	0
Proceeds from New Borrowings	295,650	100,000	8,800
Payments on Debt	(147,300)	(125,000)	(43,800)
Other Financing Activities	(532)	(379)	1,431
Net Cash Provided (Used) by Financing Activities	(249,472)	(295,136)	(152,680)
Effect of Exchange Rates on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	(2,311)	5,842	4,508
Net Increase (Decrease) in Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(70,584)	59,124	92,085
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning of Period	308,635	249,511	157,426
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, End of Period	238,051	308,635	249,511
Less: Restricted Cash Recorded in Other Current Assets	4,419	6,455	0
Less: Restricted Cash and Restricted Cash Equivalents Recorded in Other Long-Term Assets	305	361	337
Cash and Cash Equivalents	233,327	301,819	249,174
Cash paid during the year for:
Income taxes	91,925	98,730	72,612
Interest	$ 1,133	$ 2,393	$ 4,606