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Business Combinations - Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Mar. 31, 2023 | Sep. 20, 2021
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Estimated fair value of assets acquired and liabilities assumed: |  |  |
Goodwill | $ 580,542 | $ 580,542 |
Greenspring |  |  |
Estimated fair value of assets acquired and liabilities assumed: |  |  |
Cash and short-term receivables |  |  | $ 5,725
Legacy Greenspring investments in funds and accrued carried interest allocations |  |  | 1,203,299
Lease right-of-use assets, net |  |  | 2,585
Other assets and receivables |  |  | 2,146
Goodwill |  |  | 573,750
Deferred income taxes |  |  | (95,884)
Accrued expenses and other liabilities |  |  | (4,685)
Legacy Greenspring accrued carried interest-related compensation |  |  | (1,045,157)
Lease liabilities |  |  | (2,585)
Non-controlling interests in legacy Greenspring entities |  |  | (158,142)
Total |  |  | 898,183
Greenspring | Contractual rights: management contracts |  |  |
Estimated fair value of assets acquired and liabilities assumed: |  |  |
Finite-lived intangible assets |  |  | 310,944
Greenspring | Client relationships |  |  |
Estimated fair value of assets acquired and liabilities assumed: |  |  |
Finite-lived intangible assets |  |  | 96,650
Greenspring | Contractual rights: service agreements |  |  |
Estimated fair value of assets acquired and liabilities assumed: |  |  |
Finite-lived intangible assets |  |  | $ 9,537

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