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Income Taxes - Effective Income Tax Rate As a Percentage of Pretax Income Differed From the Us Federal Statutory Rate (Details) - USD ($) $ in Thousands | 12 Months Ended
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Apr. 30, 2026 | Apr. 30, 2025 | Apr. 30, 2024
Income Tax Disclosure [Abstract] |  |  |
US federal statutory rate | 21.00% | 21.00% | 21.00%
State and local income tax, net of federal (national) income tax effect | (4.40%) | (1.50%) | 4.60%
Statutory tax rate difference |  | 8.80% | (11.70%)
Other |  | 3.00% | (4.00%)
Net controlled foreign corporation tested income | 1.80% |  |
Foreign-derived deduction eligible income | (2.30%) |  |
Tax credits and related net benefits |  | (2.70%) | 1.80%
Changes in valuation allowances |  | 14.40% | (14.00%)
Nontaxable or nondeductible items | 1.60% |  |
Worldwide changes in unrecognized tax benefits | 0.20% |  |
Impairment of goodwill |  | 0.00% | (10.90%)
Return to provision |  | (1.90%) | 6.10%
Effective income tax rate | (3.00%) | 41.10% | (7.10%)
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
US federal statutory rate | $ 45,168 |  |
State and local income tax, net of federal (national) income tax effect | (9,478) |  |
Net controlled foreign corporation tested income | 3,942 |  |
Foreign-derived deduction eligible income | (5,049) |  |
Nontaxable or nondeductible items | 3,482 |  |
Worldwide changes in unrecognized tax benefits | 333 |  |
Total (benefit) provision | $ (6,531) | $ 58,717 | $ 13,272
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
US federal statutory rate | 21.00% | 21.00% | 21.00%
State and local income tax, net of federal (national) income tax effect | (4.40%) | (1.50%) | 4.60%
Statutory tax rate difference |  | 8.80% | (11.70%)
Other |  | 3.00% | (4.00%)
Net controlled foreign corporation tested income | 1.80% |  |
Foreign-derived deduction eligible income | (2.30%) |  |
Tax credits and related net benefits |  | (2.70%) | 1.80%
Changes in valuation allowances |  | 14.40% | (14.00%)
Nontaxable or nondeductible items | 1.60% |  |
Worldwide changes in unrecognized tax benefits | 0.20% |  |
Impairment of goodwill |  | 0.00% | (10.90%)
Return to provision |  | (1.90%) | 6.10%
Effective income tax rate | (3.00%) | 41.10% | (7.10%)
United Kingdom |  |  |
Income Tax Disclosure [Abstract] |  |  |
Statutory tax rate difference | 2.70% |  |
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Statutory tax rate difference | $ 5,773 |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Statutory tax rate difference | 2.70% |  |
Germany |  |  |
Income Tax Disclosure [Abstract] |  |  |
Statutory tax rate difference | (2.20%) |  |
Changes in future corporate income tax rate | (2.00%) |  |
Trade tax | 5.70% |  |
Other | 0.40% |  |
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Statutory tax rate difference | $ (4,630) |  |
Changes in future corporate income tax rate | (4,286) |  |
Trade tax | 12,225 |  |
Other | $ 905 |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Statutory tax rate difference | (2.20%) |  |
Changes in future corporate income tax rate | (2.00%) |  |
Trade tax | 5.70% |  |
Other | 0.40% |  |
Hong Kong |  |  |
Income Tax Disclosure [Abstract] |  |  |
Other | (0.40%) |  |
Pillar II top-up tax | 1.20% |  |
Tax exemption | (1.30%) |  |
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Other | $ (782) |  |
Pillar II top-up tax | 2,611 |  |
Tax exemption | $ (2,873) |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Other | (0.40%) |  |
Pillar II top-up tax | 1.20% |  |
Tax exemption | (1.30%) |  |
Brazil |  |  |
Income Tax Disclosure [Abstract] |  |  |
Withholding tax | 1.20% |  |
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Other | $ 59 |  |
Withholding tax | $ 2,686 |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Withholding tax | 1.20% |  |
Australia |  |  |
Income Tax Disclosure [Abstract] |  |  |
Statutory tax rate difference | 1.00% |  |
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Statutory tax rate difference | $ 2,164 |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Statutory tax rate difference | 1.00% |  |
Other |  |  |
Income Tax Disclosure [Abstract] |  |  |
Statutory tax rate difference | 0.30% |  |
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Statutory tax rate difference | $ 599 |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Statutory tax rate difference | 0.30% |  |
US |  |  |
Income Tax Disclosure [Abstract] |  |  |
Other | (0.30%) |  |
Effect of changes in tax laws or rates enacted in the current period | 0.00% |  |
Tax credits and related net benefits | (0.80%) |  |
Changes in valuation allowances | (26.40%) |  |
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Other | $ (624) |  |
Effect of changes in tax laws or rates enacted in the current period | 0 |  |
Tax credits | (1,737) |  |
Changes in valuation allowances | $ (57,019) |  |
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Other | (0.30%) |  |
Effect of changes in tax laws or rates enacted in the current period | 0.00% |  |
Tax credits and related net benefits | (0.80%) |  |
Changes in valuation allowances | (26.40%) |  |

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