Restructuring and Other Expense (Income), Net - Schedule of Progression of Liabilities Associated with Restructuring Activities, Combined with Reconciliation to Restructuring and Other Income, Net (Detail) - USD ($)		12 Months Ended
	May 31, 2021	May 31, 2022	May 31, 2021	May 31, 2020
Restructuring Cost and Reserve [Line Items]
Beginning Balance		$ 1,220,000	$ 6,692,000
Expense (income)	$ 11,034,000	(445,000)	2,752,000
Payments		(368,000)	(8,310,000)
Adjustments		134,000	86,000
Ending Balance	1,220,000	541,000	1,220,000	$ 6,692,000
Net (gain) loss on sale of assets		(15,794,000)	53,345,000
Gain on lease buyout		(857,000)
Restructuring and other (income) expense, net		(17,096,000)	56,097,000	10,048,000
Early Retirement And Severance
Restructuring Cost and Reserve [Line Items]
Beginning Balance		771,000	6,536,000
Expense (income)		4,000	1,314,000
Payments		(368,000)	(6,980,000)
Adjustments		134,000	(99,000)
Ending Balance	771,000	541,000	771,000	6,536,000
Facility Exit And Other Costs
Restructuring Cost and Reserve [Line Items]
Beginning Balance		449,000	156,000
Expense (income)		$ (449,000)	1,438,000
Payments			(1,330,000)
Adjustments			185,000
Ending Balance	$ 449,000		$ 449,000	$ 156,000