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Income Taxes - Net of Refunds Received by Jurisdiction (Details) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2026 | Apr. 30, 2025 | Apr. 30, 2024
Income Tax Examination [Line Items] |  |  |
Federal | $ 410 |  |
State and local | 1,789 |  |
International |  |  |
Cash paid for income taxes, net of refunds received | 58,424 | $ 53,884 | $ 50,834
United Kingdom |  |  |
International |  |  |
Other | 21,317 |  |
Germany |  |  |
International |  |  |
Other | 20,910 |  |
Australia |  |  |
International |  |  |
Other | 8,377 |  |
Other |  |  |
International |  |  |
Other | $ 5,621 |  |

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