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INCOME TAX (Reconciliation of Federal Statutory Rate to Effective Tax Rate from Continuing Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	Aug. 31, 2017
Income Tax Contingency [Line Items]
Federal statutory tax rate (percent)	21.00%	25.70%	35.00%
Income tax expense at statutory rate	$ 56,377	$ 42,471	$ 22,908
TCJA - Toll charge and related foreign tax credits	7,410	29,466	0
TCJA - Remeasurement of deferred tax balances	(586)	(25,515)	0
Foreign tax impairment on valuation of subsidiaries (1)	(29,697)	22,315	(92,321)
Gain on international restructure (1)	0	18,926	0
Change in valuation allowance	36,167	(20,839)	113,135
Nontaxable foreign interest (1)	(9,799)	(17,414)	(19,259)
Worthless stock deduction (2)	0	(6,084)	0
Foreign rate differential (3)	(1,466)	(5,973)	(7,518)
Research and experimentation credits	580	4,707	1,034
Audit settlement (4)	120	(3,187)	(659)
State and local taxes	6,085	2,317	1,490
Deferred compensation (5)	(395)	(2,036)	(2,101)
Section 199 manufacturing deduction	0	0	(1,407)
Other	6,045	407	2,042
Income tax expense on continuing operations	$ 69,681	$ 30,147	$ 15,276
Effective income tax rate from continuing operations	26.00%	18.20%	23.30%
Poland
Income Tax Contingency [Line Items]
Federal statutory tax rate (percent)	19.00%

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