Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating Activities
Net Income Including the Noncontrolling Interests in Subsidiaries	$ 118,451	$ 98,673
Adjustments to Reconcile Net Income to Net Cash Provided (Used) by Operating Activities
Amortization of Deferred Sales Commissions	1,130	1,614
Depreciation and Other Amortization	12,451	5,343
Share-Based Compensation Expense	13,188	12,768
Subsidiary Share-Based Compensation Expense	3,899	0
(Gain) Loss on Disposal of Assets	691	(509)
Provision (Benefit) for Deferred Income Taxes	5,338	5,610
Loss on Derivative	0	28,978
Net Unrealized (Gain) Loss on Investments	(2,926)	2,549
Net Sales of Investments—Consolidated Investment Companies	1,901	7,743
Other Changes in Assets and Liabilities:
(Increase) Decrease in Receivables, net	5,929	8,771
(Increase) Decrease in Prepaid Expenses and Other Assets	(2,116)	(6,807)
Increase (Decrease) in Accounts Payable and Accrued Expenses	(42,998)	(30,446)
Increase (Decrease) in Other Liabilities	(2,515)	2,099
Net Cash Provided (Used) by Operating Activities	112,423	136,386
Investing Activities
Purchases of Investments—Affiliates and Other	(15,362)	(2,515)
Cash Paid for Business Acquisitions, Net of Cash Acquired	785	0
Proceeds from Redemptions of Investments—Affiliates and Other	1,911	2,419
Cash Paid for Property and Equipment	(8,864)	(5,397)
Net Cash Provided (Used) by Investing Activities	(21,530)	(5,493)
Financing Activities
Dividends Paid	(54,549)	(52,604)
Purchases of Treasury Stock	(2,194)	(20,374)
Distributions to Noncontrolling Interest in Subsidiaries	(2,801)	(8,111)
Contributions from Noncontrolling Interest in Subsidiaries	1,864	1,163
Proceeds from New Borrowings	8,800	18,000
Payments on Debt	(18,800)	(10,000)
Other Financing Activities	171	(21)
Net Cash Provided (Used) by Financing Activities	(67,509)	(71,947)
Effect of Exchange Rates on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(246)	0
Net Increase (Decrease) in Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	23,138	58,946
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	180,564	375,755
Less: Restricted Cash and Restricted Cash Equivalents Recorded in Other Long-Term Assets	603	583
Cash and Cash Equivalents	$ 179,961	$ 375,172