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Consolidated Entities (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 30, 2022 | Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023 | May 31, 2021 | Dec. 31, 2020
CONSOLIDATED ENTITIES |  |  |  |  |  |
Initial contribution |  |  |  | $ 190,000 |  |
Total assets |  | $ 1,267,612 |  | 1,243,507 |  |
Net investment-related income (expense) earned (incurred) |  | $ 200 |  |  |  |
ISP Fund LP |  |  |  |  |  |
CONSOLIDATED ENTITIES |  |  |  |  |  |
Distribution from partnership |  |  |  |  | $ 110,000 |
Economic interest of the Partnership (in percent) |  | 100.00% |  |  |  |
Total assets |  | $ 287,200 |  | 311,800 |  |
Total liabilities |  | 1,800 |  | $ 100 |  |
Changes in fair values of equity and long-term investments, net |  | $ 26,200 | $ 4,100 |  |  |
Net investment-related income (expense) earned (incurred) |  |  | $ 500 |  |  |
Capital contribution | $ 110,000 |  |  |  |  | $ 300,000
Lock-up period | 36 months |  |  |  |  |

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