Contingencies and Accrued Losses - Changes in Accrued Warranty Balances (Detail) - USD ($) $ in Thousands		3 Months Ended
		Aug. 31, 2025	Aug. 31, 2024
Commitments and Contingencies Disclosure [Abstract]
Beginning Balance		$ 14,028	$ 11,621
Deductions	[1]	(10,605)	(6,143)
Provision charged to expense		10,350	5,712
Ending Balance		$ 13,773	$ 11,190

[1] Primarily claims paid during the period.