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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
Feb. 29, 2020
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   $ 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 | Cash Flow | Other Accrued Liabilities    
Derivative Instruments And Hedging Activities Disclosures [Line Items]    
Fair value of derivatives liabilities $ 578  
Derivatives Designated as Hedging Instruments | Interest Rate Swap | Cash Flow | Other Long-Term Liabilities    
Derivative Instruments And Hedging Activities Disclosures [Line Items]    
Fair value of derivatives liabilities 2,522  
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 5,592 2,482
Derivatives Designated as Hedging Instruments | Cross Currency Swap | Net Investment | Other Accrued Liabilities    
Derivative Instruments And Hedging Activities Disclosures [Line Items]    
Fair value of derivatives liabilities 504  
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 4,773 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 14,558 4,276
Derivatives Designated as Hedging Instruments | Cross Currency Swap | Cash Flow | Other Current Assets    
Derivative Instruments And Hedging Activities Disclosures [Line Items]    
Fair value of derivatives assets 1,562  
Derivatives Designated as Hedging Instruments | Cross Currency Swap | Cash Flow | Other Long-Term Liabilities    
Derivative Instruments And Hedging Activities Disclosures [Line Items]    
Fair value of derivatives liabilities 3,990  
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 $ 193 $ 51