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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
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Aug. 31, 2020 | Aug. 31, 2019 | Aug. 31, 2018
Income Tax Contingency [Line Items] |  |  |
Federal statutory tax rate (percent) | 21.00% | 21.00% | 25.70%
Income tax expense at statutory rate | $ 77,863 | $ 56,377 | $ 42,471
State and local taxes | 9,895 | 6,085 | 2,317
Foreign tax impairment on valuation of subsidiaries | 5,084 | (29,697) | 22,315
Foreign rate differential | (1,346) | (1,466) | (5,973)
Research and experimentation benefits | 1,085 | 580 | 4,707
Change in valuation allowance | 968 | 36,167 | (20,839)
Nontaxable foreign interest | 8 | (9,799) | (17,414)
TCJA - Toll charge and related foreign tax credits | 0 | 7,410 | 29,466
TCJA - Remeasurement of deferred tax balances | 0 | (586) | (25,515)
Audit settlement | 0 | 120 | (3,187)
Gain on international restructure | 0 | 0 | 18,926
Worthless stock deduction | 0 | 0 | (6,084)
Other | 1,089 | 5,650 | (1,629)
Income tax expense on continuing operations | $ 92,476 | $ 69,681 | $ 30,147
Effective income tax rate from continuing operations | 24.90% | 26.00% | 18.20%
Poland |  |  |
Income Tax Contingency [Line Items] |  |  |
Federal statutory tax rate (percent) | 19.00% |  |

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