Investments of Operating Entities and Consolidated Funds - Operating Entities - Equity Method Investment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 27,006	$ 47,200
Starboard Value LP
Schedule of Equity Method Investments [Line Items]
Equity method investments	20,806	36,889
Healthcare Royalty GP III, LLC
Schedule of Equity Method Investments [Line Items]
Equity method investments	1,631	1,957
HCR Canary Fund GP, LLC
Schedule of Equity Method Investments [Line Items]
Equity method investments	319	458
Healthcare Royalty GP IV, LLC
Schedule of Equity Method Investments [Line Items]
Equity method investments	1,923	1,716
RCG Longview Debt Fund IV Management, LLC
Schedule of Equity Method Investments [Line Items]
Equity method investments	391	331
HCR Overflow Fund GP, LLC
Schedule of Equity Method Investments [Line Items]
Equity method investments	578	839
HCRP MGS Account Management, LLC
Schedule of Equity Method Investments [Line Items]
Equity method investments	472	598
HCR Stafford Fund GP, LLC
Schedule of Equity Method Investments [Line Items]
Equity method investments	0	2,955
HCR Potomac Fund, L.P.
Schedule of Equity Method Investments [Line Items]
Equity method investments	0	925
Other
Schedule of Equity Method Investments [Line Items]
Equity method investments	511	532
HCRX Master GP
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 375	$ 0