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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		9 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019	Aug. 31, 2019
Debt Instrument [Line Items]
Total debt	$ 1,180,074		$ 1,180,074		$ 1,254,921
Less debt issuance costs	9,003		9,003		10,268
Total amounts outstanding	1,171,071		1,171,071		1,244,653
Less current maturities	14,506		14,506		13,510
Less short-term borrowings	2,765		2,765		3,929
Current maturities of long-term debt and short-term borrowings	17,271		17,271		17,439
Long-term debt	1,153,800		1,153,800		1,227,214
Depreciation and amortization	$ 41,765	$ 41,181	$ 124,095	$ 117,602
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	3.113%		3.113%
Total debt	$ 110,125		$ 110,125		210,125
Poland credit facilities | Revolving credit facility
Debt Instrument [Line Items]
Weighted average interest rate	1.989%		1.989%
Total debt	$ 22,350		$ 22,350		0
Short-term borrowings
Debt Instrument [Line Items]
Weighted average interest rate, short term	1.90%		1.90%
Total debt	$ 2,765		$ 2,765		3,929
Other
Debt Instrument [Line Items]
Weighted average interest rate, short term	5.10%		5.10%
Total debt	$ 21,329		$ 21,329		23,168
Finance leases
Debt Instrument [Line Items]
Total debt	$ 43,505		$ 43,505		$ 37,699

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