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Fair Value Measurements - Narrative (Details) | 12 Months Ended
--- | ---
Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Changes in fair value hierarchy levels | $ 0 | $ 0
Changes in fair value hierarchy levels | 0 | 0
Investments of Consolidated Funds | 131,858,000 | 30,595,000
Fair Value Measured at Net Asset Value Per Share |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Investments of Consolidated Funds | 118,200,000 | 23,700,000
Level III |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Investments of Consolidated Funds | $ 13,700,000 | $ 6,900,000
Minimum | Measurement Input, Discount Rate |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Business combination, contingent consideration, liability, measurement input | 0.07 |

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