Net Capital Requirements and Other Regulatory Matters - Additional Information (Details) |
Sep. 30, 2022
USD ($)
|
|---|---|
| Schedule Of Compliance With Regulatory Capital Requirements For Broker Dealer [Line Items] | |
| Minimum net capital requirement | $ 1,000,000 |
| Net capital | 223,500,000 |
| Excess net capital | 222,500,000 |
| Pershing clearing arrangement | |
| Schedule Of Compliance With Regulatory Capital Requirements For Broker Dealer [Line Items] | |
| Excess net capital required | 120,000,000 |
| Class B senior notes | |
| Schedule Of Compliance With Regulatory Capital Requirements For Broker Dealer [Line Items] | |
| Minimum regulatory net capital required | 120,000,000 |
| Committed credit facility | |
| Schedule Of Compliance With Regulatory Capital Requirements For Broker Dealer [Line Items] | |
| Minimum regulatory net capital required | 120,000,000 |
| Revolving credit facility | |
| Schedule Of Compliance With Regulatory Capital Requirements For Broker Dealer [Line Items] | |
| Minimum regulatory net capital required | $ 120,000,000 |