Fair Value Measurements - Assets Measured at Fair Value on Non-Recurring Basis (Parenthetical) (Detail) - USD ($) $ in Thousands		May 31, 2023		May 31, 2022
Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair market value of assets		$ 2,693		$ 700
Capital Project | Jefferson | Building Products Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated salvage value		70
Long Lived Assets Held For Sale | Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair market value of assets		2,623	[1]	700	[2]
Long Lived Assets Held For Sale | Production Equipment Member | Twinsburg Member
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair market value of assets				$ 700
Long Lived Assets Held And Used | Fair Value, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair market value of assets	[3]	$ 70

[1] Comprised of the following: (1) idled equipment at the manufacturing facility in Taylor, Michigan; and (2) the net assets of Samuel's toll processing facility in Cleveland, Ohio. Refer to “Note E – Goodwill and Other Long-Lived Assets” for additional information.

[2] Comprised of production equipment at the Samuel facility in Twinsburg, Ohio with an estimated fair market value of $700. Refer to “Note E – Goodwill and Other Long-Lived Assets” for additional information.

[3] Comprised of certain assets associated with a capital project at our Building Products facility in Jefferson, Ohio which were written down to their estimated salvage value of $70. These assets continue to be held and used. Refer to “Note E – Goodwill and Other Long-Lived Assets” for additional information.