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v3.25.4

Fair Value Measurements - Measured on a Recurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Assets |  |  |
Restricted cash | $ 225,298 | $ 119,724 | $ 108,180
Investment securities — trading | 76,108 | 42,267 |
Money Market Funds [Member] |  |  |
Assets |  |  |
Investment securities — trading | 0 | 110 |
Equity securities |  |  |
Assets |  |  |
Investment securities — trading | 2,505 | 8 |
U.S. Treasury Securities [Member] |  |  |
Assets |  |  |
Investment securities — trading | 40,029 | 28,511 |
Mutual Funds [Member] |  |  |
Assets |  |  |
Investment securities — trading | 33,559 | 13,627 |
Recurring |  |  |
Assets |  |  |
Cash equivalents | 104,377 | 53,672 |
Restricted cash | 127,585 | 100,368 |
Investment securities — trading | 76,108 | 42,267 |
Other assets | 1,471,620 | 1,139,515 |
Total assets at fair value | 2,601,024 | 2,007,986 |
Liabilities |  |  |
Securities sold, but not yet purchased | 174 | 169 |
Other liabilities | 495,895 | 475,750 |
Total liabilities at fair value | 495,895 | 475,750 |
Recurring | Federal Or Other Regulations |  |  |
Assets |  |  |
Cash equivalents | 821,334 | 672,164 |
Recurring | Mutual funds |  |  |
Liabilities |  |  |
Securities sold, but not yet purchased |  | 18 |
Recurring | Equity securities |  |  |
Liabilities |  |  |
Securities sold, but not yet purchased | 174 | 151 |
Recurring | Money Market Funds [Member] |  |  |
Assets |  |  |
Investment securities — trading |  | 110 |
Recurring | Mutual funds |  |  |
Assets |  |  |
Investment securities — trading | 33,559 | 13,627 |
Recurring | Equity securities |  |  |
Assets |  |  |
Investment securities — trading | 2,505 | 8 |
Recurring | U.S. Treasury Securities [Member] |  |  |
Assets |  |  |
Investment securities — trading | 40,029 | 28,511 |
Recurring | Debt Securities [Member] |  |  |
Assets |  |  |
Investment securities — trading | 15 | 11 |
Recurring | Deferred compensation plan |  |  |
Assets |  |  |
Other assets | 1,097,514 | 856,843 |
Recurring | Other investments |  |  |
Assets |  |  |
Other assets | 2,423 | 3,989 |
Recurring | Fractional Shares |  |  |
Assets |  |  |
Other assets | 371,683 | 278,683 |
Liabilities |  |  |
Other liabilities | 371,683 | 278,683 |
Recurring | Contingent Consideration |  |  |
Liabilities |  |  |
Other liabilities | 124,038 | 196,898 |
Recurring | Level 1 |  |  |
Assets |  |  |
Restricted cash | 127,585 | 100,368 |
Investment securities — trading | 76,093 | 42,256 |
Other assets | 1,469,197 | 1,135,526 |
Total assets at fair value | 2,598,586 | 2,003,986 |
Liabilities |  |  |
Securities sold, but not yet purchased | 174 | 151 |
Other liabilities | 371,857 | 278,834 |
Total liabilities at fair value | 371,857 | 278,834 |
Recurring | Level 1 | Federal Or Other Regulations |  |  |
Assets |  |  |
Cash equivalents | 821,334 |  |
Recurring | Level 1 | Equity securities |  |  |
Liabilities |  |  |
Securities sold, but not yet purchased | 174 | 151 |
Recurring | Level 1 | Debt Securities [Member] |  |  |
Liabilities |  |  |
Securities sold, but not yet purchased |  | 0 |
Recurring | Level 1 | Money Market Funds [Member] |  |  |
Assets |  |  |
Investment securities — trading |  | 110 |
Recurring | Level 1 | Mutual funds |  |  |
Assets |  |  |
Investment securities — trading |  | 13,627 |
Recurring | Level 1 | Equity securities |  |  |
Assets |  |  |
Investment securities — trading | 2,505 | 8 |
Recurring | Level 1 | U.S. Treasury Securities [Member] |  |  |
Assets |  |  |
Investment securities — trading | 40,029 | 28,511 |
Recurring | Level 1 | Debt Securities [Member] |  |  |
Assets |  |  |
Investment securities — trading |  | 0 |
Recurring | Level 1 | Deferred compensation plan |  |  |
Assets |  |  |
Other assets | 1,097,514 | 856,843 |
Recurring | Level 1 | Other investments |  |  |
Assets |  |  |
Other assets | 0 | 0 |
Recurring | Level 1 | Fractional Shares |  |  |
Assets |  |  |
Other assets | 371,683 | 278,683 |
Liabilities |  |  |
Other liabilities | 371,683 |  |
Obligations, Fair Value Disclosure |  | 278,683 |
Recurring | Level 1 | Contingent Consideration |  |  |
Liabilities |  |  |
Other liabilities | 0 | 0 |
Recurring | Level 1 | Cash Equivalents Not Subject To Segregation |  |  |
Assets |  |  |
Cash equivalents | 104,377 | 53,672 |
Recurring | Level 1 | Other Security Investments |  |  |
Assets |  |  |
Investment securities — trading | 0 |  |
Recurring | Level 1 | Cash Equivalents Segregated Under Federal Or Other Regulations | Federal Or Other Regulations |  |  |
Assets |  |  |
Cash equivalents |  | 672,164 |
Recurring | Level 1 | Mutual Funds [Member] |  |  |
Assets |  |  |
Investment securities — trading | 33,559 |  |
Recurring | Level 2 |  |  |
Assets |  |  |
Restricted cash | 0 | 0 |
Investment securities — trading | 15 | 11 |
Other assets | 2,423 | 3,989 |
Total assets at fair value | 2,438 | 4,000 |
Liabilities |  |  |
Securities sold, but not yet purchased | 0 | 18 |
Other liabilities | 0 | 18 |
Total liabilities at fair value | 0 | 18 |
Recurring | Level 2 | Federal Or Other Regulations |  |  |
Assets |  |  |
Cash equivalents | 0 | 0 |
Recurring | Level 2 | Equity securities |  |  |
Liabilities |  |  |
Securities sold, but not yet purchased | 0 | 0 |
Recurring | Level 2 | Debt Securities [Member] |  |  |
Liabilities |  |  |
Securities sold, but not yet purchased | 15 | 18 |
Recurring | Level 2 | Money Market Funds [Member] |  |  |
Assets |  |  |
Investment securities — trading | 0 | 0 |
Recurring | Level 2 | Mutual funds |  |  |
Assets |  |  |
Investment securities — trading | 0 | 0 |
Recurring | Level 2 | Equity securities |  |  |
Assets |  |  |
Investment securities — trading |  | 0 |
Recurring | Level 2 | U.S. Treasury Securities [Member] |  |  |
Assets |  |  |
Investment securities — trading | 0 | 0 |
Recurring | Level 2 | Debt Securities [Member] |  |  |
Assets |  |  |
Investment securities — trading | 15 | 11 |
Recurring | Level 2 | Deferred compensation plan |  |  |
Assets |  |  |
Other assets | 0 | 0 |
Recurring | Level 2 | Other investments |  |  |
Assets |  |  |
Other assets | 2,423 | 3,989 |
Recurring | Level 2 | Fractional Shares |  |  |
Assets |  |  |
Other assets | 0 | 0 |
Liabilities |  |  |
Other liabilities | 0 |  |
Obligations, Fair Value Disclosure |  | 0 |
Recurring | Level 2 | Contingent Consideration |  |  |
Liabilities |  |  |
Other liabilities | 0 |  |
Obligations, Fair Value Disclosure |  | 0 |
Recurring | Level 2 | Cash Equivalents Not Subject To Segregation |  |  |
Assets |  |  |
Cash equivalents | 0 | 0 |
Recurring | Level 2 | Other Security Investments |  |  |
Assets |  |  |
Investment securities — trading |  | 11 |
Recurring | Level 3 |  |  |
Assets |  |  |
Restricted cash | 0 | 0 |
Investment securities — trading | 0 | 0 |
Other assets | 0 | 0 |
Total assets at fair value | 0 | 0 |
Liabilities |  |  |
Securities sold, but not yet purchased | 0 | 0 |
Other liabilities | 124,038 | 196,898 |
Total liabilities at fair value | 124,038 | 196,898 |
Recurring | Level 3 | Federal Or Other Regulations |  |  |
Assets |  |  |
Cash equivalents | 0 | 0 |
Recurring | Level 3 | Equity securities |  |  |
Liabilities |  |  |
Securities sold, but not yet purchased | 0 | 0 |
Recurring | Level 3 | Debt Securities [Member] |  |  |
Liabilities |  |  |
Securities sold, but not yet purchased |  | 0 |
Recurring | Level 3 | Money Market Funds [Member] |  |  |
Assets |  |  |
Investment securities — trading | 0 | 0 |
Recurring | Level 3 | Mutual funds |  |  |
Assets |  |  |
Investment securities — trading | 0 | 0 |
Recurring | Level 3 | Equity securities |  |  |
Assets |  |  |
Investment securities — trading |  | 0 |
Recurring | Level 3 | U.S. Treasury Securities [Member] |  |  |
Assets |  |  |
Investment securities — trading | 0 | 0 |
Recurring | Level 3 | Debt Securities [Member] |  |  |
Assets |  |  |
Investment securities — trading |  | 0 |
Recurring | Level 3 | Deferred compensation plan |  |  |
Assets |  |  |
Other assets | 0 | 0 |
Recurring | Level 3 | Other investments |  |  |
Assets |  |  |
Other assets | 0 | 0 |
Recurring | Level 3 | Fractional Shares |  |  |
Assets |  |  |
Other assets | 0 | 0 |
Liabilities |  |  |
Other liabilities | 0 |  |
Obligations, Fair Value Disclosure |  | 0 |
Recurring | Level 3 | Contingent Consideration |  |  |
Liabilities |  |  |
Other liabilities | 124,038 |  |
Obligations, Fair Value Disclosure |  | 196,898 |
Recurring | Level 3 | Cash Equivalents Not Subject To Segregation |  |  |
Assets |  |  |
Cash equivalents | 0 | $ 0 |
Recurring | Level 3 | Other Security Investments |  |  |
Assets |  |  |
Investment securities — trading | $ 0 |  |

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