Other (Income) Expense, Net (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 28, 2022	Feb. 28, 2021	Feb. 28, 2022	Feb. 28, 2021
Other Income and Expenses [Abstract]
Pension non-service (credits)/costs	$ (2,644)	$ 1,714	$ (8,012)	$ 8,420
Other	(98)	(458)	(989)	(913)
Other (income) expense, net	$ (2,742)	$ 1,256	$ (9,001)	$ 7,507