Income Taxes - Schedule of Reconciliation of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2025	May 31, 2024	May 31, 2023
Income Tax Disclosure [Abstract]
Income taxes at the U.S. federal statutory rate	$ 475,482	$ 414,463	$ 355,561
Permanent differences	(75,966)	(67,310)	(59,502)
State and local income taxes, net of federal benefit	64,052	49,560	46,245
Other	(11,647)	5,330	2,834
Income taxes	$ 451,921	$ 402,043	$ 345,138