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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Mar. 31, 2025
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Provision for income taxes | $ 10,862 | $ 5,915 | $ 17,472 | $ 7,099 |
Effective income tax rate | (24.00%) | (5.00%) | (19.00%) | (5.00%) |
Valuation allowance | $ 459,000 |  | $ 459,000 |  | $ 430,500
Increase (decrease) in gross unrecognized tax benefits | 3,200 |  | 7,300 |  |
Increase (decrease) in unrecognized tax benefits income tax penalties and interest expense | 2,300 |  | 1,400 |  |
Impact on effective tax rate | 14,200 |  | 14,200 |  |
Unrecognized tax benefits | 195,500 |  | 195,500 |  |
One Big Beautiful Bill Act [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Incremental non-cash tax expense | $ 6,500 |  | $ 6,500 |  |

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