Investments of Operating Entities and Consolidated Funds - Operating Entities - Securities Sold, Not Yet Purchased (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Investments Sold, Not yet Purchased [Line Items]
Securities sold, not yet purchased, at fair value	$ 913,574	$ 1,201,448
Common Stock
Investments Sold, Not yet Purchased [Line Items]
Securities sold, not yet purchased, at fair value	910,458	1,192,396
Corporate Bonds
Investments Sold, Not yet Purchased [Line Items]
Securities sold, not yet purchased, at fair value	31	37
Preferred Stock
Investments Sold, Not yet Purchased [Line Items]
Securities sold, not yet purchased, at fair value	3,085	9,009
Warrants and Rights
Investments Sold, Not yet Purchased [Line Items]
Securities sold, not yet purchased, at fair value	$ 0	$ 6