Goodwill and Long-Lived Assets - Additional Information (Detail) - USD ($)	3 Months Ended
	Aug. 31, 2022		May 31, 2022
Impaired Long Lived Assets Held And Used [Line Items]
Goodwill	$ 411,902,000		$ 401,469,000
Impairment of long-lived assets	312,000
Impairment of long-lived assets	312,000
Fair Value, Nonrecurring
Impaired Long Lived Assets Held And Used [Line Items]
Fair market value of assets	3,280,000		700,000
Fair Value, Nonrecurring | Fair Value, Inputs, Level 2
Impaired Long Lived Assets Held And Used [Line Items]
Fair market value of assets	3,280,000		700,000
Long Lived Assets Held for Sale | Fair Value, Nonrecurring
Impaired Long Lived Assets Held And Used [Line Items]
Fair market value of assets	3,280,000	[1]	700,000	[2]
Long Lived Assets Held for Sale | Fair Value, Nonrecurring | Fair Value, Inputs, Level 2
Impaired Long Lived Assets Held And Used [Line Items]
Fair market value of assets	$ 3,280,000	[1]	$ 700,000	[2]

[1] Comprised of fixed assets at our Steel Processing facility in Cleveland, Ohio facility with an estimated fair market value of $3,280,000. Refer to “Note E – Goodwill and Long-Lived Assets” for additional information.

[2] Comprised of production equipment at our Twinsburg, Ohio facility with an estimated fair market value of $700,000.