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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
May 08, 2023 | Jul. 08, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Mar. 31, 2023
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Revenues |  |  | $ 1,225,415 | $ 663,559 | $ 2,005,206 | $ 1,238,615 |
Interest income |  |  | 32,486 | 6,809 | 51,675 | 6,932 |
Positive Outcome Of Litigation [Member] |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Litigation Settlement, Amount Awarded from Other Party | $ 97,500 | $ 62,200 |  |  |  |  |
Revenues |  |  | 99,900 | 55,800 | 99,900 | 55,800 |
Interest income |  |  | 7,200 | $ 6,400 | 7,200 | $ 6,400 |
Unfavorable Regulatory Action [Member] |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
U.S. government contract-related reserves |  |  | $ 15,600 |  | $ 15,600 |  | $ 12,900

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