Investments in Securities - Schedule of Financial Instruments Owned and Pledged as Collateral (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Public deposits
Investments in Securities
Securities owned and pledged as collateral amortized cost	$ 15,402	$ 4,742
Public deposits | Estimate of Fair Value Measurement
Investments in Securities
Fair Value	13,489	5,029
Collateralized borrowing accounts
Investments in Securities
Securities owned and pledged as collateral amortized cost	210,330	133,242
Collateralized borrowing accounts | Estimate of Fair Value Measurement
Investments in Securities
Fair Value	186,170	139,112
Other
Investments in Securities
Securities owned and pledged as collateral amortized cost	4,018	6,257
Other | Estimate of Fair Value Measurement
Investments in Securities
Fair Value	3,764	6,461
Securities Pledged as Collateral
Investments in Securities
Securities owned and pledged as collateral amortized cost	229,750	144,241
Securities Pledged as Collateral | Estimate of Fair Value Measurement
Investments in Securities
Fair Value	$ 203,423	$ 150,602