Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash Flows from Operating Activities:
Net income (loss)	$ 200,822	$ 58,149
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation expense, intangible asset and other amortization	35,217	32,153
Stock-based compensation	21,833	16,412
Amortization of deferred commissions	2,606	1,544
Payments of deferred commissions	(4,664)	(1,475)
Equity in earnings of equity method investments	(3,701)	(855)
(Gain) loss on extinguishment of debt	0	(705)
Distributions from equity method investments	3,133	921
Sales (purchases) of investments, net	(3,453)	15,586
Deferred taxes, net	(2,672)	7,020
Changes in operating assets and liabilities:
Accounts receivable, net and other assets	(41,421)	(7,989)
Accrued compensation and benefits, accounts payable, accrued liabilities and other liabilities	23,242	(22,931)
Operating activities of consolidated investment products ("CIP"):
Net cash provided by (used in) operating activities	423,679	(380,267)
Cash Flows from Investing Activities:
Capital expenditures and other asset purchases	(4,822)	(789)
Net cash provided by (used in) investing activities	(16,525)	8,935
Cash Flows from Financing Activities:
Refinancing of credit agreement	81,155	0
Payment of long term debt	(11,826)	(61,573)
Payment of deferred financing costs	(7,039)	0
Common stock dividends paid	(20,030)	(16,460)
Preferred stock dividends paid	0	(2,084)
Repurchases of common shares	(32,499)	(25,000)
Taxes paid related to net share settlement of restricted stock units	(19,362)	(5,530)
Net contributions from (distributions to) noncontrolling interests	552	(5,935)
Net cash provided by (used in) financing activities	(153,513)	305,840
Net increase (decrease) in cash, cash equivalents and restricted cash	253,641	(65,492)
Cash, cash equivalents and restricted cash, beginning of period	339,849	321,939
Cash, cash equivalents and restricted cash, end of period	593,490	256,447
Non-Cash Investing Activities:
Contingent consideration	137,664	0
Non-Cash Financing Activities:
Increase (decrease) to noncontrolling interests due to consolidation (deconsolidation) of CIP, net	(32,007)	17,137
Common stock dividends payable	11,478	6,288
Conversion of preferred stock to common stock	0	115,000
Reconciliation of cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash at end of period	593,490	256,447
Consolidated entity excluding consolidated investment products
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Realized and unrealized (gains) losses on investments, net	(2,875)	(2,069)
Reconciliation of cash, cash equivalents and restricted cash
Cash and cash equivalents	437,242
Consolidated Investment Products
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Realized and unrealized (gains) losses on investments, net	(4,139)	6,739
Operating activities of consolidated investment products ("CIP"):
Purchases of investments by CIP	(917,355)	(1,114,801)
Sales of investments by CIP	1,101,258	624,675
Net proceeds (purchases) of short term investments by CIP	16,176	1,434
(Purchases) sales of securities sold short by CIP, net	(11)	267
Change in other assets of CIP	223	(2,039)
Change in liabilities of CIP	(540)	(3,472)
Amortization of discount on notes payable of CIP	0	11,169
Cash Flows from Investing Activities:
Change in cash and cash equivalents of CIP due to consolidation (deconsolidation), net	(11,703)	9,724
Cash Flows from Financing Activities:
Payments on borrowings by CIP	(144,464)	(358,725)
Borrowings by CIP	0	$ 781,147
Reconciliation of cash, cash equivalents and restricted cash
Cash and cash equivalents	155,678
Cash pledged or on deposit of CIP	$ 570