Investment (Income), Net - Investment (Income), Net (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023
Investment Income, Net [Abstract]
Interest (income)	$ (3,080)	$ (4,897)	$ (7,063)	$ (10,348)
Net (gain) loss on marketable securities	(4,713)	225	(10,684)	(6,226)
Dividend (income)	(733)	(617)	(1,805)	(1,154)
Investment (income), net	$ (8,526)	$ (5,289)	$ (19,552)	$ (17,728)