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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, 2023 | May 31, 2022 | May 31, 2021
Income Tax Disclosure [Abstract] |  |  |
Income tax expense at the U.S. statutory federal income tax rate | $ 136,370 | $ 127,428 | $ 140,372
Foreign rate differential and other foreign tax adjustments | 1,535 | 6,278 | 11,942
State and local income taxes, net | 22,017 | 20,393 | 18,625
Impact of GILTI provisions | 4,217 | 1,709 | 1,598
Nondeductible business expense | 1,257 | 532 | 616
Valuation allowance | (1,199) | (32,720) | (4,389)
Deferred tax liability for unremitted foreign earnings |  | (10,686) | 5,348
Changes in unrecognized tax benefits | (3,334) | (1,682) | (1,847)
Equity-based compensation | (3,482) | (1,776) | (8,651)
Nondeductible goodwill impairment | 7,264 |  |
Other | 2,608 | 4,857 | 1,324
Provision for Income Taxes | $ 169,651 | $ 114,333 | $ 164,938
Effective Income Tax Rate | 26.10% | 18.80% | 24.70%

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