Consolidation - Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Noncontrolling interests	$ (113,718)	$ (138,965)	$ (115,513)	$ (63,845)
VOEs
Variable Interest Entity [Line Items]
Cash and cash equivalents	1,153	787
Investments	24,669	21,544
Other assets	295	64
Notes payable	0	0
Securities purchased payable and other liabilities	(573)	(558)
Noncontrolling interests	(7,879)	(4,935)
Net interests in CIP	17,665	16,902
CLOs
Variable Interest Entity [Line Items]
Cash and cash equivalents	249,003	205,192
Investments	2,106,764	2,055,107
Other assets	43,993	43,327
Notes payable	(2,083,314)	(2,033,617)
Securities purchased payable and other liabilities	(230,141)	(184,214)
Noncontrolling interests	(5,917)	(8,350)
Net interests in CIP	80,388	77,445
Other
Variable Interest Entity [Line Items]
Cash and cash equivalents	789	1,245
Investments	58,680	63,587
Other assets	1,157	819
Notes payable	0	0
Securities purchased payable and other liabilities	(183)	(296)
Noncontrolling interests	(10,389)	(7,481)
Net interests in CIP	$ 50,054	$ 57,874