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Commitment and Contingencies - Narrative (Details) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) city | Sep. 30, 2020 USD ($) | Mar. 31, 2021 USD ($)
Other Commitments [Line Items] |  |  |  |
Number of cities for leased offices | city |  | 21 |  |
Lease not yet commenced, future lease payments |  | $ 3.5 |  |
Lease not yet commenced, term |  | 9 years |  |
Occupancy expense | $ 2.3 |  | $ 4.6 |
Unfunded capital commitments |  | $ 72.3 |  | $ 60.5
Carried interest, contingent repayment obligations |  | 156.0 |  |
Legacy Funds |  |  |  |
Other Commitments [Line Items] |  |  |  |
Unfunded capital commitments |  | $ 39.2 |  |

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