Derivative Instruments and Hedging Activities - Schedule of Summary of Derivative Hedges (Detail) $ in Thousands	9 Months Ended
	Feb. 29, 2020 USD ($)
Commodity Contracts | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 35,581
Commodity Contracts | Minimum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	2020-03
Commodity Contracts | Maximum | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Maturity Date	2021-09
Foreign Currency Exchange Contracts | Derivatives Not Designated As Hedging Instruments
Derivative [Line Items]
Notional Amount	$ 5,642
Maturity Date	2020-03
Cash Flow Hedges | Commodity Contracts
Derivative [Line Items]
Notional Amount	$ 44,506
Cash Flow Hedges | Commodity Contracts | Minimum
Derivative [Line Items]
Maturity Date	2020-03
Cash Flow Hedges | Commodity Contracts | Maximum
Derivative [Line Items]
Maturity Date	2021-12