Changes in Accrued Warranty Balances (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Nov. 30, 2022	Nov. 30, 2021	Nov. 30, 2022	Nov. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Beginning Balance		$ 12,500	$ 13,032	$ 10,905	$ 13,175
Deductions	[1]	(8,160)	(5,424)	(14,504)	(11,682)
Provision charged to expense		7,169	5,278	15,108	11,393
Ending Balance		$ 11,509	$ 12,886	$ 11,509	$ 12,886

[1] Primarily claims paid during the period.