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Business Combinations and Divestitures - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Apr. 30, 2025 | Dec. 31, 2024 | Jul. 01, 2024 | May 09, 2024 | Apr. 03, 2024 | Dec. 31, 2023
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Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill [Abstract] |  |  |  |  |  |  |
Goodwill | $ 385,966 |  | $ 377,842 |  |  |  | $ 361,780
Kontora Family Office GmbH ("Kontora") |  |  |  |  |  |  |
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill [Abstract] |  |  |  |  |  |  |
Cash and cash equivalents |  | $ 3,440 |  |  |  |  |
Fees receivable |  | 2,702 |  |  |  |  |
Equity method investments |  | 28 |  |  |  |  |
Intangible assets |  | 14,075 |  |  |  |  |
Goodwill |  | 981 |  |  |  |  |
Operating lease right-of-use assets |  | 1,952 |  |  |  |  |
Deferred tax assets, net |  | 1,451 |  |  |  |  |
Other assets |  | 2,326 |  |  |  |  |
Total Assets Acquired |  | 26,955 |  |  |  |  |
Business Combination, Recognized Liability Assumed, Liability [Abstract] |  |  |  |  |  |  |
Accounts payable and accrued expenses |  | 526 |  |  |  |  |
Accrued compensation and profit sharing |  | 218 |  |  |  |  |
Debt, net of unamortized deferred financing cost |  | 732 |  |  |  |  |
Operating lease liability |  | 1,952 |  |  |  |  |
Other liabilities, net |  | 3,057 |  |  |  |  |
Deferred tax liability |  | 4,774 |  |  |  |  |
Total Liabilities Assumed |  | 11,259 |  |  |  |  |
Total Assets Acquired and Liabilities Assumed |  | $ 15,696 |  |  |  |  |
Envoi, LLC (“Envoi”) |  |  |  |  |  |  |
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill [Abstract] |  |  |  |  |  |  |
Intangible assets |  |  |  | $ 23,300 |  |  |
Goodwill |  |  |  | 10,824 |  |  |
Operating lease right-of-use assets |  |  |  | 196 |  |  |
Other assets |  |  |  | 157 |  |  |
Total Assets Acquired |  |  |  | 34,477 |  |  |
Business Combination, Recognized Liability Assumed, Liability [Abstract] |  |  |  |  |  |  |
Accounts payable and accrued expenses |  |  |  | 1 |  |  |
Operating lease liability |  |  |  | 218 |  |  |
Total Liabilities Assumed |  |  |  | 219 |  |  |
Total Assets Acquired and Liabilities Assumed |  |  |  | $ 34,258 |  |  |
Pointwise Partners Limited ("PW") |  |  |  |  |  |  |
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill [Abstract] |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  | $ 269 |  |
Intangible assets |  |  |  |  | 9,700 |  |
Goodwill |  |  |  |  | 6,747 |  |
Other assets |  |  |  |  | 20 |  |
Total Assets Acquired |  |  |  |  | 16,736 |  |
Business Combination, Recognized Liability Assumed, Liability [Abstract] |  |  |  |  |  |  |
Accounts payable and accrued expenses |  |  |  |  | 589 |  |
Other liabilities, net |  |  |  |  | 292 |  |
Deferred tax liability |  |  |  |  | 1,749 |  |
Total Liabilities Assumed |  |  |  |  | 2,630 |  |
Total Assets Acquired and Liabilities Assumed |  |  |  |  | $ 14,106 |  |
East End Advisors, LLC ("EEA") |  |  |  |  |  |  |
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill [Abstract] |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  | $ 218 |
Intangible assets |  |  |  |  |  | 62,700 |
Goodwill |  |  |  |  |  | 30,094 |
Operating lease right-of-use assets |  |  |  |  |  | 2,326 |
Other assets |  |  |  |  |  | 1,181 |
Total Assets Acquired |  |  |  |  |  | 96,531 |
Business Combination, Recognized Liability Assumed, Liability [Abstract] |  |  |  |  |  |  |
Accounts payable and accrued expenses |  |  |  |  |  | 79 |
Operating lease liability |  |  |  |  |  | 2,326 |
Other liabilities, net |  |  |  |  |  | 1,012 |
Total Liabilities Assumed |  |  |  |  |  | 3,417 |
Total Assets Acquired and Liabilities Assumed |  |  |  |  |  | 93,114 |
East End Advisors, LLC ("EEA") | Management/advisory fees |  |  |  |  |  |  |
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill [Abstract] |  |  |  |  |  |  |
Management/advisory fees receivable |  |  |  |  |  | $ 12 |

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