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Investments - Schedule of Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Sep. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Mar. 31, 2022
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Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Fair value investments | $ 18,570 |  | $ 21,586 |  |  |
Investments valued under the measurement alternative | 175,522 | $ 175,522 | 168,732 | $ 165,832 | $ 190,023 | $ 156,100
Total Investments | 587,771 |  | 530,921 |  |  |
Equity method investments in Partnerships |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity method investments | 391,884 |  | 340,603 |  |  |
Other equity method investments |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity method investments | $ 1,795 |  | $ 0 |  |  |

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