Contingencies and Accrued Losses - Changes in Accrued Warranty Balances (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Nov. 30, 2025	Nov. 30, 2024	Nov. 30, 2025	Nov. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Beginning Balance		$ 13,773	$ 11,190	$ 14,028	$ 11,621
Deductions	[1]	(9,977)	(8,459)	(20,582)	(14,601)
Provision charged to expense		8,152	8,947	18,502	14,658
Ending Balance		$ 11,948	$ 11,678	$ 11,948	$ 11,678

[1] Primarily claims paid during the period.