Contingencies and Accrued Losses - Changes in Accrued Warranty Balances (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Feb. 28, 2025	Feb. 29, 2024	Feb. 28, 2025	Feb. 29, 2024
Commitments and Contingencies Disclosure [Abstract]
Beginning Balance		$ 11,678	$ 12,651	$ 11,621	$ 11,776
Deductions	[1]	(5,998)	(7,479)	(20,600)	(24,863)
Provision charged to expense		6,415	7,297	21,074	25,556
Ending Balance		$ 12,095	$ 12,469	$ 12,095	$ 12,469

[1] Primarily claims paid during the period.