Contingencies and Accrued Losses - Accrued Loss Reserves (Detail) - USD ($) $ in Thousands	May 31, 2024	May 31, 2023
Schedule Of Accrued Liabilities [Line Items]
Accrued losses	$ 32,518	$ 26,470
Accrued Loss Reserves - Noncurrent	31,467	32,350
Accrued product liability and other loss reserves
Schedule Of Accrued Liabilities [Line Items]
Accrued losses	23,353	16,995
Accrued Loss Reserves - Noncurrent	25,289	22,849
Accrued warranty reserves
Schedule Of Accrued Liabilities [Line Items]
Accrued losses	8,017	8,448
Accrued Loss Reserves - Noncurrent	3,604	3,328
Accrued environmental reserves
Schedule Of Accrued Liabilities [Line Items]
Accrued losses	1,148	1,027
Accrued Loss Reserves - Noncurrent	$ 2,574	$ 6,173