Investment Securities - Equity in (Losses) Earnings of Investments (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Schedule of Equity Method Investments [Line Items]
Equity in losses from investments	$ (159)	$ (2,242)
Mutual fund and hedge funds
Schedule of Equity Method Investments [Line Items]
Equity in losses from investments	$ (159)	$ (2,242)

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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration