FAIR VALUE (Financial Assets and Liabilities Not Required to Be Measured at Fair Value) (Details) - USD ($) $ in Thousands	Feb. 28, 2021	Aug. 31, 2020
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Financial liabilities	$ 1,042,617	$ 1,092,266
2031 Notes
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Financial liabilities	300,000	0
2031 Notes | Level 2 | Fair Value
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Financial liabilities	301,674	0
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 | Fair Value
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Financial liabilities	319,428	319,377
2026 Notes
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Financial liabilities	0	350,000
2026 Notes | Level 2 | Fair Value
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Financial liabilities	0	367,374
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 | Fair Value
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Financial liabilities	349,104	345,335
Revolving credit facility | Poland Term Loan
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Financial liabilities	40,068	40,713
Revolving credit facility | Poland Term Loan | Level 2 | Fair Value
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Financial liabilities	$ 40,068	$ 40,713