Changes in Accrued Warranty Balances (Detail) - USD ($) $ in Thousands		12 Months Ended
		May 31, 2022	May 31, 2021	May 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Beginning Balance		$ 13,175	$ 11,106	$ 10,414
Deductions	[1]	(26,332)	(25,817)	(20,762)
Provision charged to expense		24,062	27,886	21,454
Ending Balance		$ 10,905	$ 13,175	$ 11,106

[1] Primarily claims paid during the year.