Derivative Instruments and Hedging Activities - Schedule of Summary of Derivative Hedges (Detail) $ in Thousands	12 Months Ended
	May 31, 2020 USD ($)
Commodity Contracts | Minimum [Member] | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 33,351
Maturity Date	2020-06
Commodity Contracts | Maximum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	2021-12
Foreign Currency Exchange Contracts | Minimum [Member] | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 3,762
Maturity Date	2020-06
Cash Flow Hedges | Commodity Contracts
Derivative [Line Items]
Notional Amount	$ 58,953
Cash Flow Hedges | Commodity Contracts | Minimum [Member]
Derivative [Line Items]
Maturity Date	2020-06
Cash Flow Hedges | Commodity Contracts | Maximum
Derivative [Line Items]
Maturity Date	2021-12