Restructuring and Other Income, Net - Schedule of Progression of Liabilities Associated with Restructuring Activities, Combined with Reconciliation to Restructuring and Other Income, Net (Detail) - USD ($) $ in Thousands		3 Months Ended
		Aug. 31, 2022	Aug. 31, 2021
Restructuring Cost and Reserve [Line Items]
Beginning Balance		$ 541
Income		77
Payments		(422)
Ending Balance		196
Net gain on sale of assets	[1]	(1,177)
Restructuring and other income, net		(1,100)	$ (12,274)
Early Retirement And Severance
Restructuring Cost and Reserve [Line Items]
Beginning Balance		541
Income		77
Payments		(422)
Ending Balance		$ 196

[1] On June 14, 2022, we sold real property in Tulsa, Oklahoma, for net cash proceeds of $5,775,000, resulting in a pre-tax gain of $1,177,000. These assets were excluded from the sale of our former oil & gas equipment business in January 2021. The net book value classified as assets held for sale immediately prior to closing was $4,598,000.