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
	May 31, 2024	May 31, 2023	May 31, 2022
Income Tax Disclosure [Abstract]
Income tax expense at the U.S. statutory federal income tax rate	$ 165,446	$ 136,370	$ 127,428
Foreign rate differential and other foreign tax adjustments	4,342	1,535	6,278
State and local income taxes, net	28,000	22,017	20,393
Impact of GILTI provisions	3,548	4,217	1,709
Nondeductible business expense	1,944	1,257	532
Valuation allowance	(754)	1,199	(32,720)
Deferred tax liability for unremitted foreign earnings	3,658		(10,686)
Changes in unrecognized tax benefits	2,209	(3,334)	(1,682)
Equity-based compensation	(5,496)	(3,482)	(1,776)
Nondeductible goodwill impairment		7,264
Other	(4,502)	2,608	4,857
Provision for Income Taxes	$ 198,395	$ 169,651	$ 114,333
Effective Income Tax Rate	25.20%	26.10%	18.80%