Postretirement Benefits - Changes in Benefit Obligation (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]
Benefit obligation at beginning of year	$ 1,768	$ 2,260
Interest cost	87	84	$ 41
Benefit payments	(149)	(207)
Actuarial (gains)	(85)	(369)
Benefit Obligation at End of Year	1,621	1,768	2,260
Non-U.S. Plans
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]
Benefit obligation at beginning of year	31,037	30,645
Service cost	2,259	1,951	1,623
Interest cost	1,550	1,374	1,124
Benefit payments	(674)	(557)
Actuarial (gains)	(7,983)	(276)
Currency exchange rate changes	(131)	(2,100)
Benefit Obligation at End of Year	$ 26,058	$ 31,037	$ 30,645