Contingencies and Accrued Losses - Changes in Accrued Warranty Balances (Detail) - USD ($) $ in Thousands		3 Months Ended
		Aug. 31, 2023	Aug. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Beginning Balance		$ 11,776	$ 10,905
Deductions	[1]	(7,407)	(6,344)
Provision charged to expense		7,633	7,939
Ending Balance		$ 12,002	$ 12,500

[1] Primarily claims paid during the period.