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Income Taxes - Reconciliation of Income Tax Expense (Benefit) Computed by Applying U.S. Statutory Federal Income Tax Rate against Income (Loss) before Income Taxes to Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands | 12 Months Ended
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May 31, 2025 | May 31, 2024 | May 31, 2023
Income Tax Disclosure [Abstract] |  |  |
Income tax expense at the U.S. statutory federal income tax rate | $ 166,480 | $ 165,446 | $ 136,370
Foreign rate differential and other foreign tax adjustments | (32,497) | 9,632 | 5,722
Impact of foreign derived intangible income deduction | (38,174) | (5,290) | (4,187)
State and local income taxes, net | 34,432 | 28,000 | 22,017
Impact of GILTI provisions | 3,960 | 3,548 | 4,217
Nondeductible business expense | 1,895 | 1,944 | 1,257
Valuation allowance | 17,246 | (754) | 1,199
Deferred tax liability for unremitted foreign earnings |  | 3,658 |
Changes in unrecognized tax benefits | (3,771) | 2,209 | (3,334)
Equity-based compensation | (1,963) | (5,496) | (3,482)
Nondeductible goodwill impairment | 2,119 |  | 7,264
Deferred tax adjustment to U.S. foreign tax credit carryforwards | (43,922) |  |
Other | (3,372) | (4,502) | 2,608
Provision for Income Taxes | $ 102,433 | $ 198,395 | $ 169,651
Effective Income Tax Rate | 12.90% | 25.20% | 26.10%

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