Investment Securities - Narrative (Details)	6 Months Ended
	Jun. 30, 2023 USD ($) investment	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Schedule of Equity Method Investments [Line Items]
Total long-term investments	$ 44,752,000		$ 44,959,000
Cash distributions received	0	$ 1,349,000
In-transit redemptions	1,900,000
Investment	$ 5,000,000
Number of investments not qualify for the NAV practical expedient | investment	2,000
Equity securities and other long-term investments at cost	$ 7,755,000		$ 2,755,000
Impairment and other adjustments	$ 0	$ 0
Minimum | Mutual Fund And Hedge Funds
Schedule of Equity Method Investments [Line Items]
Equity-method ownership percentage	7.02%
Maximum | Mutual Fund And Hedge Funds
Schedule of Equity Method Investments [Line Items]
Equity-method ownership percentage	38.51%
Quoted Prices in Active Markets for Identical Assets (Level 1)
Schedule of Equity Method Investments [Line Items]
Total long-term investments	$ 426,000