Consolidation - Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Noncontrolling interests	$ (124,442)	$ (139,147)	$ (138,965)	$ (131,669)	$ (131,525)	$ (115,513)
VOEs
Variable Interest Entity [Line Items]
Cash and cash equivalents	781		787
Investments	19,451		21,544
Other assets	112		64
Notes payable	0		0
Securities purchased payable and other liabilities	(597)		(558)
Noncontrolling interests	(5,862)		(4,935)
Net interests in CIP	13,885		16,902
CLOs
Variable Interest Entity [Line Items]
Cash and cash equivalents	83,660		205,192
Investments	1,901,419		2,055,107
Other assets	16,542		43,327
Notes payable	(1,864,943)		(2,033,617)
Securities purchased payable and other liabilities	(71,674)		(184,214)
Noncontrolling interests	(6,734)		(8,350)
Net interests in CIP	58,270		77,445
Other
Variable Interest Entity [Line Items]
Cash and cash equivalents	1,941		1,245
Investments	56,105		63,587
Other assets	778		819
Notes payable	0		0
Securities purchased payable and other liabilities	(212)		(296)
Noncontrolling interests	(10,298)		(7,481)
Net interests in CIP	$ 48,314		$ 57,874