Investment (Income), Net - Investment (Income), Net (Detail) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2025	Aug. 31, 2024
Investment Income, Net [Abstract]
Interest (income)	$ (3,760)	$ (3,983)
Net (gain) on marketable securities	(8,673)	(5,971)
Dividend (income)	(971)	(1,072)
Investment (income), net	$ (13,404)	$ (11,026)