Postretirement Benefits - Components of Net Postretirement Expense (Detail) - Postretirement Benefits - USD ($) $ in Thousands	12 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2022
Domestic
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	$ 87	$ 84	$ 41
Prior service (credit)		(121)	(161)
Net actuarial (gains) losses	(15)	43	61
Net Pension Cost	72	6	(59)
Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	2,259	1,951	1,623
Interest cost	1,550	1,374	1,124
Net actuarial (gains) losses	(49)	(51)	121
Net Pension Cost	$ 3,760	$ 3,274	$ 2,868