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FAIR VALUE (Financial Assets and Liabilities Not Required to Be Measured at Fair Value) (Details) - USD ($)
$ in Thousands
Feb. 28, 2019
Aug. 31, 2018
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities $ 1,410,164 $ 1,170,129
2027 Notes    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 300,000 300,000
2027 Notes | Level 2 | Carrying Value    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 300,000 300,000
2027 Notes | Level 2 | Fair Value    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 284,823 281,655
2026 Notes    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 350,000 350,000
2026 Notes | Level 2 | Carrying Value    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 350,000 350,000
2026 Notes | Level 2 | Fair Value    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 344,670 339,238
2023 Notes    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 330,000 330,000
2023 Notes | Level 2 | Carrying Value    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 330,000 330,000
2023 Notes | Level 2 | Fair Value    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 326,806 326,090
Short-term borrowings    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 59,473 0
Short-term borrowings | Level 2 | Carrying Value    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 59,473 0
Short-term borrowings | Level 2 | Fair Value    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 59,473 0
Revolving credit facility | Term Loans    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 314,250 142,500
Revolving credit facility | Term Loans | Level 2 | Carrying Value    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities 314,250 142,500
Revolving credit facility | Term Loans | Level 2 | Fair Value    
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]    
Financial liabilities $ 314,250 $ 142,500