Consolidation - Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Noncontrolling interests	$ (138,965)	$ (115,513)	$ (63,845)	$ (57,481)
VOEs
Variable Interest Entity [Line Items]
Cash and cash equivalents	787	9,837
Investments	21,544	57,256
Other assets	64	1,989
Notes payable	0	0
Securities purchased payable and other liabilities	(558)	(2,566)
Noncontrolling interests	(4,935)	(24,707)
Net interests in CIP	16,902	41,809
CLOs
Variable Interest Entity [Line Items]
Cash and cash equivalents	205,192	82,295
Investments	2,055,107	2,217,055
Other assets	43,327	10,484
Notes payable	(2,033,617)	(2,190,445)
Securities purchased payable and other liabilities	(184,214)	(42,940)
Noncontrolling interests	(8,350)	(9,799)
Net interests in CIP	77,445	66,650
Other
Variable Interest Entity [Line Items]
Cash and cash equivalents	1,245	1,206
Investments	63,587	58,966
Other assets	819	957
Notes payable	0	0
Securities purchased payable and other liabilities	(296)	(323)
Noncontrolling interests	(7,481)	(3,354)
Net interests in CIP	$ 57,874	$ 57,452