Investment Securities - Equity in (Losses) Earnings of Investments (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Schedule of Equity Method Investments [Line Items]
Equity in (losses) earnings from investments	$ (619)	$ 44	$ (5,172)	$ 1,562
Mutual fund and hedge funds
Schedule of Equity Method Investments [Line Items]
Equity in (losses) earnings from investments	$ (619)	$ 44	$ (5,172)	$ 1,562

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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