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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
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