Comprehensive Income (Loss) - Components of Changes in AOCI (Parenthetical) (Detail) $ in Thousands		12 Months Ended
		May 31, 2023 USD ($) Beneficiary	May 31, 2022 USD ($)	May 31, 2021 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Settlement cost	[1]	$ 4,774	$ 1,357	$ 18
Non-cash settlement charge		$ 4,774
Number of beneficiaries to pay and administer the retirement benefits owed | Beneficiary		220
Pension Liability Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Settlement cost		$ 4,774

[1] Relates to the settlement of certain participant balances within the Gerstenslager Plan.   During fiscal 2023 and fiscal 2022, we also incurred $135 and $85, respectively, in net periodic benefit cost related to the Tempel Steel Company Postretirement Benefit Plan.