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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, 2018	Aug. 31, 2017	Aug. 31, 2016
Income Tax Contingency [Line Items]
Blended Federal statutory rate (percent)	25.70%
Federal statutory tax rate (percent)		35.00%	35.00%
Income tax expense at statutory rate	$ 42,471	$ 22,908	$ 26,592
TCJA - Toll charge and related foreign tax credits	29,466	0	0
TCJA - Remeasurement of deferred tax balances	(25,515)	0	0
Foreign tax impairment on valuation of subsidiaries (1)	22,315	(92,321)	(60,204)
Gain on international restructure (1)	18,926	0	0
Change in valuation allowance	(20,839)	113,135	75,822
Nontaxable foreign interest (1)	(17,414)	(19,259)	(16,063)
Worthless stock deduction (2)	(6,084)	0	0
Foreign rate differential (3)	(5,973)	(7,518)	(1,719)
Research and experimentation credits	4,707	1,034	1,357
Audit settlement (4)	(3,187)	(659)	(10,264)
State and local taxes	2,317	1,490	2,185
Deferred compensation (5)	(2,036)	(2,101)	(1,375)
Section 199 manufacturing deduction	0	(1,407)	(4,694)
Other	407	2,042	5,053
Income tax expense on continuing operations	$ 30,147	$ 15,276	$ 13,976
Effective income tax rate from continuing operations	18.20%	23.30%	18.40%
Poland
Income Tax Contingency [Line Items]
Federal statutory tax rate (percent)	19.00%

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