Derivative Instruments and Hedging Activities - Schedule of Summary of Derivative Hedges (Detail) $ in Thousands	6 Months Ended
	Nov. 30, 2018 USD ($)
Commodity Contracts | Minimum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 10,513
Maturity Date	2018-12
Commodity Contracts | Maximum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	2020-04
Foreign Currency Exchange Contracts | Minimum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 5,030
Maturity Date	2018-12
Foreign Currency Exchange Contracts | Maximum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	2019-05
Cash Flow Hedges | Commodity Contracts | Minimum
Derivative [Line Items]
Notional Amount	$ 22,067
Maturity Date	2018-12
Cash Flow Hedges | Commodity Contracts | Maximum
Derivative [Line Items]
Maturity Date	2019-12