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, 2021	Aug. 31, 2020
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 1,220
Expense (income)	5
Payments	(201)
Adjustments	0
Ending Balance	1,024
Net gain on sale of assets	(12,279)
Restructuring and other income, net	(12,274)	$ 1,848
Early Retirement And Severance
Restructuring Cost and Reserve [Line Items]
Beginning Balance	771
Expense (income)	5
Payments	(201)
Adjustments	0
Ending Balance	575
Facility Exit And Other Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance	449
Expense (income)	0
Payments	0
Adjustments	0
Ending Balance	$ 449