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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 | 3 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 28, 2019 | May 31, 2020 | May 31, 2019 | May 31, 2018
Income Tax Disclosure [Abstract] |  |  |  |
Income tax expense at the U.S. statutory federal income tax rate |  | $ 85,630 | $ 71,367 | $ 121,812
Impact of foreign operations |  | 3,433 | (1,571) | (16,276)
State and local income taxes, net |  | 11,651 | 7,224 | 9,520
Impact of GILTI provisions |  | 3,051 | 5,772 |
Domestic manufacturing deduction |  |  |  | (4,839)
Nondeductible business expense |  | 2,005 | 2,259 | 2,473
Valuation allowance |  | 14,008 | 7,021 | (5,235)
Deferred tax liability for unremitted foreign earnings |  | (5,527) |  | (77,970)
Changes in unrecognized tax benefits |  | 1,292 | (8,480) |
Other |  | (3,351) | 1,195 | 737
FY19 GILTI impact of issued regulations |  | (4,348) |  |
Equity-based compensation |  | (5,162) | (4,496) | (4,652)
Transition tax liability | $ 1,800 |  | (1,868) | 67,899
Remeasurement of U.S. deferred income taxes |  |  | (6,265) | (15,678)
Provision for Income Taxes |  | $ 102,682 | $ 72,158 | $ 77,791
Effective Income Tax Rate |  | 25.20% | 21.20% | 18.70%

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