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Equity Method Investments, Investment in Datavant (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2023
Investments [Abstract] |  |  |  |  |
Aggregate fair value investment | $ 239,927 |  | $ 239,927 |  | $ 304,317
Datavant Merger [Member] |  |  |  |  |
Investments [Abstract] |  |  |  |  |
Equity method investment ownership percentage | 9.00% |  | 9.00% |  |
Aggregate fair value investment | $ 135,900 |  | $ 135,900 |  | $ 178,600
Unrealized gain (losses) on investments | $ (28,400) | $ 7,500 | $ (42,600) | $ (21,400) |

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