Securities - Carrying and Ownership Percentage of Each Equity Method Investment (Parenthetical) (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Canapi Ventures SBIC Fund, LP
Schedule Of Equity Method Investments [Line Items]
Equity method investments, committed amount of investment	$ 5,600,000	$ 6,800,000
Canapi Ventures Fund, LP
Schedule Of Equity Method Investments [Line Items]
Equity method investments, committed amount of investment	627,000	770,000
Canapi Ventures Fund II, LP
Schedule Of Equity Method Investments [Line Items]
Equity method investments, committed amount of investment	7,500,000	0
Other
Schedule Of Equity Method Investments [Line Items]
Equity method investments, committed amount of investment	$ 3,500,000	$ 0