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CREDIT ARRANGEMENTS (Long-term Debt, Including the Deferred Gain from the Termination of the Interest Rate Swaps) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2020	Feb. 28, 2019	Feb. 29, 2020	Feb. 28, 2019	Aug. 31, 2019
Debt Instrument [Line Items]
Total debt	$ 1,176,713		$ 1,176,713		$ 1,254,921
Less debt issuance costs	9,425		9,425		10,268
Total amounts outstanding	1,167,288		1,167,288		1,244,653
Less current maturities	14,443		14,443		13,510
Less short-term borrowings	8,272		8,272		3,929
Current maturities of long-term debt and short-term borrowings	22,715		22,715		17,439
Long-term debt	1,144,573		1,144,573		1,227,214
Depreciation and amortization	$ 41,389	$ 41,245	$ 82,330	$ 76,421
2027 Notes
Debt Instrument [Line Items]
Weighted average interest rate	5.375%		5.375%
Total debt	$ 300,000		$ 300,000		300,000
2026 Notes
Debt Instrument [Line Items]
Weighted average interest rate	5.75%		5.75%
Total debt	$ 350,000		$ 350,000		350,000
2023 Notes
Debt Instrument [Line Items]
Weighted average interest rate	4.875%		4.875%
Total debt	$ 330,000		$ 330,000		330,000
Term Loan | Revolving credit facility
Debt Instrument [Line Items]
Weighted average interest rate	3.409%		3.409%
Total debt	$ 110,125		$ 110,125		210,125
Poland credit facilities | Revolving credit facility
Debt Instrument [Line Items]
Weighted average interest rate	2.637%		2.637%
Total debt	$ 11,290		$ 11,290		0
Short-term borrowings
Debt Instrument [Line Items]
Weighted average interest rate, short term	2.40%		2.40%
Total debt	$ 8,272		$ 8,272		3,929
Other
Debt Instrument [Line Items]
Weighted average interest rate, short term	5.10%		5.10%
Total debt	$ 23,168		$ 23,168		23,168
Finance leases
Debt Instrument [Line Items]
Total debt	$ 43,858		$ 43,858		$ 37,699

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