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Derivatives and Hedging - Schedule of Fair Values of Qualifying and Non-Qualifying Instruments Used in Hedging Transactions (Detail) - USD ($) $ in Thousands | Nov. 30, 2018 | May 31, 2018
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Derivatives Designated as Hedging Instruments | Foreign Currency Exchange (Cash Flow) | Other Current Assets |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Fair value of derivatives assets |  | $ 133
Derivatives Designated as Hedging Instruments | Cross Currency Swap (Net Investment) | Other Current Assets |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Fair value of derivatives assets | $ 3,001 | 2,580
Derivatives Designated as Hedging Instruments | Cross Currency Swap (Net Investment) | Other Assets (Long-Term) |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Fair value of derivatives assets | 4,560 | 1,986
Derivatives Designated as Hedging Instruments | Cross Currency Swap (Net Investment) | Other Long-Term Liabilities |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Fair value of derivatives liabilities | 4,475 | 5,293
Derivatives Designated as Hedging Instruments | Interest Rate Swap (Fair Value) | Other Accrued Liabilities |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Fair value of derivatives liabilities | 811 | 441
Derivatives Designated as Hedging Instruments | Interest Rate Swap (Fair Value) | Other Long-Term Liabilities |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Fair value of derivatives liabilities | 2,616 | 2,634
Derivatives Not Designated as Hedging Instruments | Foreign Currency Exchange (Cash Flow) | Other Current Assets |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Fair value of derivatives assets | $ 12 | 7
Derivatives Not Designated as Hedging Instruments | Foreign Currency Exchange (Cash Flow) | Other Accrued Liabilities |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Fair value of derivatives liabilities |  | $ 2,985

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