Contingencies and Accrued Losses - Changes in Accrued Warranty Balances (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Feb. 28, 2026	Feb. 28, 2025	Feb. 28, 2026	Feb. 28, 2025
Commitments and Contingencies Disclosure [Abstract]
Beginning Balance		$ 11,948	$ 11,678	$ 14,028	$ 11,621
Deductions	[1]	(6,861)	(5,998)	(27,443)	(20,600)
Provision charged to expense		5,795	6,415	24,297	21,074
Ending Balance		$ 10,882	$ 12,095	$ 10,882	$ 12,095

[1] Primarily claims paid during the period.