Contingencies and Accrued Losses - Changes in Accrued Warranty Balances (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Beginning Balance		$ 11,190	$ 12,002	$ 11,621	$ 11,776
Deductions	[1]	(8,459)	(9,977)	(14,601)	(17,384)
Provision charged to expense		8,947	10,626	14,658	18,259
Ending Balance		$ 11,678	$ 12,651	$ 11,678	$ 12,651

[1] Primarily claims paid during the period.