Derivative Instruments and Hedging Activities - Schedule of Summary of Derivative Hedges (Detail) $ in Thousands	12 Months Ended
	May 31, 2019 USD ($)
Commodity Contracts | Minimum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 53,310
Maturity Date	2019-06
Commodity Contracts | Maximum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	2020-08
Foreign Currency Exchange Contracts | Minimum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 8,590
Maturity Date	2019-06
Foreign Currency Exchange Contracts | Maximum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	2020-03
Cash Flow Hedges | Commodity Contracts | Minimum
Derivative [Line Items]
Notional Amount	$ 61,454
Maturity Date	2019-06
Cash Flow Hedges | Commodity Contracts | Maximum
Derivative [Line Items]
Maturity Date	2020-12