Contingencies and Accrued Losses - Changes in Accrued Warranty Balances (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Feb. 28, 2023	Feb. 28, 2022	Feb. 28, 2023	Feb. 28, 2022
Commitments and Contingencies Disclosure [Abstract]
Beginning Balance		$ 11,509	$ 12,886	$ 10,905	$ 13,175
Deductions	[1]	(5,620)	(5,186)	(20,124)	(16,868)
Provision charged to expense		5,558	4,628	20,666	16,021
Ending Balance		$ 11,447	$ 12,328	$ 11,447	$ 12,328

[1] Primarily claims paid during the period.