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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 | Aug. 31, 2019 | May 31, 2019
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Derivatives Designated as Hedging Instruments | Interest Rate Swap (Fair Value) | Other Current Assets |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Fair value of derivatives assets | $ 77 | $ 513
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 |  | 230
Derivatives Designated as Hedging Instruments | Interest Rate Swap (Fair Value) | Other Assets (Long-Term) |  |
Derivative Instruments And Hedging Activities Disclosures [Line Items] |  |
Fair value of derivatives assets | 1,733 |
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 | 1,737 | 2,482
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 | 5,103 | 6,163
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 | 1,108 | 4,276
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 |  | $ 51
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 | $ 318 |

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