Investment (Income), Net - Investment (Income), Net (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2025	Feb. 29, 2024	Feb. 28, 2025	Feb. 29, 2024
Investment Income, Net [Abstract]
Interest (income)	$ (3,172)	$ (5,914)	$ (10,235)	$ (16,262)
Net loss (gain) on marketable securities	5,559	(10,270)	(5,125)	(16,496)
Dividend (income)	(3,653)	(2,481)	(5,458)	(3,635)
Investment (income), net	$ (1,266)	$ (18,665)	$ (20,818)	$ (36,393)