Revenue - Additional Information (Detail) $ in Thousands	3 Months Ended
	Aug. 31, 2021 USD ($) Segment	Aug. 31, 2020 USD ($) Segment	May 31, 2021 USD ($)
Disaggregation Of Revenue [Line Items]
Number of reportable segments | Segment	4	4
Revenue performance obligation description of payment terms	Payment terms and conditions vary by contract type, although our customers’ payment terms generally include a requirement to pay within 30 to 60 days of fulfilling our performance obligations
Revenue, Practical Expedient, Financing Component [true false]	false
Increase in net contract assets	$ 10,050
Net Sales	1,650,420	$ 1,606,670
Long-term deferred revenue	67,400		$ 67,800
General Contracting And Roofing Services
Disaggregation Of Revenue [Line Items]
Net Sales	$ 43,500