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Investments of Operating Entities and Consolidated Funds - Consolidated Funds - Securities Owned at Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Investment Holdings [Line Items]    
Securities owned, at fair value $ 0 $ 10,622
Common Stock    
Investment Holdings [Line Items]    
Securities owned, at fair value 0 4,816
Warrants and Rights    
Investment Holdings [Line Items]    
Securities owned, at fair value $ 0 $ 5,806