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Investments - Summary of Proceeds from Sales of Investments in Proprietary Funds and Realized Gains and Losses Recognized (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Proceeds and realized gains and losses recognized        
Sale Proceeds     $ 2,942 $ 8,181
Proprietary Funds        
Proceeds and realized gains and losses recognized        
Sale Proceeds $ 32 $ 0 32 65
Realized Gains 4 0 4 0
Realized (Losses) $ 0 $ 0 $ 0 $ (2)