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Business Combinations and Divestitures - Deconsolidation, Disposal and Assets Held For Sale (Details) - USD ($) |  | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
May 08, 2024 | May 08, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Mar. 06, 2024 | Jan. 09, 2024 | Nov. 06, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Intangible asset impairment charge |  |  | $ 2,214,000 | $ 52,918,000 |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Gain (loss) on investments |  |  |  |
Assets held for sale |  |  | $ 0 | 56,634,000 |  |  |
Liabilities held for sale |  |  | 0 | 13,792,000 |  |  |
Held for Sale |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Assets held for sale |  |  | 0 | 56,634,000 |  |  |
Liabilities held for sale |  |  | 0 | 13,792,000 |  |  |
Wealth & Capital Solutions | Disposal group, disposed of by sale, not discontinued operations | Family Office Service ("FOS") |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Gain (loss) on disposal |  |  | 9,400,000 |  |  |  |
Expected cash consideration |  |  |  |  |  |  | $ 20,100,000
Adjustment to cash consolidation |  | $ (600,000) |  |  |  |  |
Cash consideration, net of adjustments | $ 19,500,000 |  |  |  |  |  |
Alvarium RE Limited ("ARE") | International Real Estate | Entity owned by management Of Alvarium Home REIT Advisors Ltd (“AHRA”) |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Intangible asset impairment charge |  |  |  | 29,400,000 |  |  |
LondonMetric Property Plc | International Real Estate | Disposal group, disposed of by sale, not discontinued operations | LXi Reit Advisors Limited (“LRA”) | Real Estate Fund Management |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Intangible asset impairment charge |  |  |  | $ 23,500,000 |  |  |
Ownership percentage in disposed asset (in percent) |  |  |  |  |  | 100.00% |
Consideration receivable |  |  |  |  | $ 33,100,000 | $ 33,100,000 |
Contingent consideration receivable |  |  |  |  | $ 5,100,000 | $ 5,100,000 |
Gain (loss) on disposal |  |  | $ (400,000) |  |  |  |

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