Restructuring and Other Income, Net - Additional Information (Detail) - USD ($)		1 Months Ended	12 Months Ended
	Jun. 09, 2021	Apr. 30, 2022	May 31, 2024	May 31, 2023	May 31, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring and other expense, net			$ 0	$ (4,200,000)	$ (14,500,000)
Restructuring liabilities			0	0	500,000
Net book value		$ 1,400,000	$ 474,800,000	$ 414,400,000
Net cash proceeds		4,000,000
Gain on sale of joint venture facility		$ 2,600,000
Additional incremental early retirement and severance costs					$ 300,000
WSP Joint Venture
Restructuring Cost and Reserve [Line Items]
Net book value	$ 7,600,000
Net cash proceeds	19,800,000
Gain on sale of joint venture facility	$ 12,200,000