Fair Value Measurements - Assets Measured at Fair Value on Non-Recurring Basis (Detail) - Fair Value, Nonrecurring - USD ($) $ in Thousands		May 31, 2024	May 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		$ 5,000	$ 70
Long Lived Assets Held for Sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[1]		70
Investments in Unconsolidated Affiliate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[2]	31,367
Investment in Notes Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[3]	5,000
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		5,000	70
Fair Value, Inputs, Level 2 | Long Lived Assets Held for Sale
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[1]		$ 70
Fair Value, Inputs, Level 2 | Investment in Notes Receivable
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[3]	5,000
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure		31,367
Fair Value, Inputs, Level 3 | Investments in Unconsolidated Affiliate
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	[2]	$ 31,367

[1] 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.

[2] On May 29, 2024, in connection with the contribution of the net assets of the Sustainable Energy Solutions business to the newly-formed Sustainable Energy Solutions joint venture, we obtained a 49% minority ownership interest. In accordance with the applicable accounting guidance, our minority ownership interest in the Sustainable Energy Solutions joint venture was recorded at its acquisition date fair value of $31,367.

[3] Reflects the write-down of an investment in notes receivable that was determined to be other than temporarily impaired.