Derivative Instruments and Hedging Activities - Schedule of Summary of Derivative Hedges (Detail) $ in Thousands	9 Months Ended
	Feb. 28, 2019 USD ($)
Commodity Contracts | Minimum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 14,567
Maturity Date	2019-03
Commodity Contracts | Maximum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	2020-06
Foreign Currency Exchange Contracts | Minimum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 6,255
Maturity Date	2019-03
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	$ 22,760
Maturity Date	2019-03
Cash Flow Hedges | Commodity Contracts | Maximum
Derivative [Line Items]
Maturity Date	2020-06