Contingencies and Accrued Losses - Changes in Accrued Warranty Balances (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Nov. 30, 2023	Nov. 30, 2022	Nov. 30, 2023	Nov. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Beginning Balance		$ 12,002	$ 12,500	$ 11,776	$ 10,905
Deductions	[1]	(9,977)	(8,160)	(17,384)	(14,504)
Provision charged to expense		10,626	7,169	18,259	15,108
Ending Balance		$ 12,651	$ 11,509	$ 12,651	$ 11,509

[1] Primarily claims paid during the period.