Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands		May 31, 2020	May 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets		$ 2,800
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets		181	$ 2,414
Liabilities		8,777	12,238
Fair Value, Measurements, Recurring | Derivative Instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	[1]	181	2,414
Liabilities	[1]	8,777	12,238
Fair Value, Measurements, Recurring | Fair Value Inputs Level2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets		181	2,414
Liabilities		8,777	12,238
Fair Value, Measurements, Recurring | Fair Value Inputs Level2 | Derivative Instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets	[1]	181	2,414
Liabilities	[1]	$ 8,777	$ 12,238

[1] The fair value of our derivative financial instruments was based on the present value of the expected future cash flows considering the risks involved, including non-performance risk, and using discount rates appropriate for the respective maturities.  Market observable, Level 2 inputs are used to determine the present value of the expected future cash flows.  Refer to “Note Q – Derivative Financial Instruments and Hedging Activities” for additional information regarding our use of derivative financial instruments