Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2018
Statement of Comprehensive Income [Abstract]
Change in fair value of interest rate lock agreements, tax benefit	$ (32,793)	$ (8,734)	$ 0
Amortization of interest rate lock agreement, tax expense	463	717	571
Other, tax (benefit) expense	(2,802)	(1,618)	119
Other comprehensive (loss) income, tax (benefit) expense	$ (35,132)	$ (9,635)	$ 690