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Commitments and contingencies (Details) - USD ($) | Dec. 31, 2025 | Dec. 31, 2024 | Jul. 01, 2021
--- | --- | --- | ---
Product Liability Contingency [Line Items] |  |  |
Debt issuance amount | $ 76,252,000 | $ 77,752,000 |
Capitala Acquisition | Promissory Note |  |  |
Product Liability Contingency [Line Items] |  |  |
Debt issuance amount |  |  | $ 4,000,000.0
Credit facility, maximum borrowing capacity |  |  | $ 6,000,000.0
Asset Management | Investment Commitments |  |  |
Product Liability Contingency [Line Items] |  |  |
Investment commitments | 1,400,000 | 1,400,000 |
Insurance Solutions | Investment Commitments |  |  |
Product Liability Contingency [Line Items] |  |  |
Investment commitments | $ 49,500,000 | $ 43,200,000 |

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