Fair Value - Assets Measured at Fair Value on Non-Recurring Basis (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Feb. 28, 2023	Feb. 28, 2023	May 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charge of long-lived assets	[1]	$ 484	$ 484
Capital Project | Building Products Facility | Jefferson
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated salvage value				$ 70

[1] A reconciliation of net earnings from continuing operations (the most comparable GAAP financial measure) to consolidated adjusted EBITDA is included in the MD&A “Results of Operations” section of this Form 10-Q for the respective three and nine months ended February 29, 2024 and February 28, 2023.