ACCOUNTING POLICIES - Recently Adopted Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Sep. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating assets	$ 111,230
Current	28,614
Long-term	84,843
Cumulative effect on retained earnings of adoption of ASU 2016-02		$ (2,747)
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect on retained earnings of adoption of ASU 2016-02	$ 0
Other Noncurrent Assets | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating assets			$ 113,400
Accrued Expenses and Other Payables | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Current			30,900
Other Noncurrent Liabilities | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long-term			$ 84,900