Fair Value Measurements - Schedule of Changes in Fair Value of the Level 3 Assets (Details) - Level 3 - USD ($) $ in Thousands |
6 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] | ||
| Beginning balance | $ 233,171 | $ 167,361 |
| Change in fair value of investment in Datavant, included in net loss | 86,052 | 68,586 |
| Ending balance | $ 319,223 | $ 235,947 |
| Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Gain (Loss) on Investments | Gain (Loss) on Investments |