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Cash and Cash Equivalents and Restricted Cash (Tables) | 12 Months Ended
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Dec. 31, 2025
Cash and Cash Equivalents [Abstract] |
Summary of Reconciliation of Cash and Cash Equivalents with Restricted or Segregated Cash | The following table provides a reconciliation of cash and cash equivalents together with restricted or segregated cash as reported within the Consolidated Statements of Financial Condition to the sum of the same such amounts shown in the Consolidated Statements of Cash Flows:
|  |  | As of December 31, |
| Statement of Financial Condition Location |  | 2025 |  |  | 2024 |  |  | 2023 |
|  |  | (In thousands) |
Cash and cash equivalents | Cash and cash equivalents |  | $ | 519,734 |  |  | $ | 544,478 |  |  | $ | 451,280 |
Cash segregated for regulatory purposes | Cash segregated under federal regulations |  |  | 48,722 |  |  |  | 47,107 |  |  |  | 45,122 |
Restricted cash deposits with clearing organizations and broker-dealers | Receivables from broker-dealers, clearing organizations and customers |  |  | 107,223 |  |  |  | 107,652 |  |  |  | 115,151 |
Other restricted cash deposits | Prepaid expenses and other assets |  |  | 172 |  |  |  | 1,222 |  |  |  | 119 |
Total |  |  | $ | 675,851 |  |  | $ | 700,459 |  |  | $ | 611,672 |

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- Definition Tabular disclosure of the components of cash and cash equivalents. + References No definition available. + Details
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