Employee Pension Plans - Additional Information (Detail) $ in Thousands	1 Months Ended	12 Months Ended
	Aug. 31, 2022 USD ($) Beneficiary	May 31, 2023 USD ($)	May 31, 2022 USD ($)	May 31, 2021 USD ($)	Dec. 01, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Description of investment policy and strategy for the defined benefit plan		The investment policy and strategy for the defined benefit plans is: (i) long-term in nature with liquidity requirements that are anticipated to be minimal due to the projected normal retirement date of the average employee and the current average age of participants; (ii) to earn nominal returns, net of investment fees, equal to or in excess of the defined benefit plans’ respective liability growth rate; and (iii) to include a diversified asset allocation of domestic and international equities and fixed income investments.
Expected employer contribution to defined benefit plan during fiscal 2024		$ 1,669
Net periodic benefit cost		$ 23,866	$ 18,087	$ 17,554
Discount rate		4.25%	2.74%	2.65%
Gerstenslager Company
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, funded percentage	31.00%
Defined benefit plan, benefit obligation, non-cash settlement charge	$ 4,774
Number of beneficiaries owed | Beneficiary	220
Tempel Steel Company
Defined Benefit Plan Disclosure [Line Items]
Pension and other postretirement benefit obligations, net					$ 40,160
Net periodic benefit cost		$ 135	$ 85
Australian Sustainable Energy Solutions
Defined Benefit Plan Disclosure [Line Items]
Accrued liability of unfunded plans included in other liabilities		$ 6,045	$ 6,249
Assumed salary rate increase		2.75%	2.75%	2.75%
Discount rate		4.00%	1.90%	1.10%