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INCOME TAXES (Narrative) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Aug. 31, 2017 | Aug. 31, 2016 | Aug. 31, 2015 | Aug. 31, 2014
Income Tax Contingency [Line Items] |  |  |  |
Deferred tax liabilities arising from timing differences in certain subsidiaries | $ 1,800,000 | $ 1,800,000 |  |
Provision for income taxes, percentage | 31.70% | 32.60% | 34.80% |
Effective income tax rate change | 31.70% |  |  |
Deferred tax assets, valuation allowance | $ 2,000,000 |  |  |
Deferred Tax Assets, Net, Foreign | 9,400,000 | $ 8,900,000 |  |
Operating loss carryforwards (NOLs), annual limitation amount | 3,500,000 |  |  |
Undistributed foreign earnings | 544,600,000 | 472,500,000 |  |
Unrecognized tax benefits | 7,694,000 | 7,754,000 | $ 8,159,000 | $ 8,786,000
Deferred income taxes that could reduce unrecognized tax benefits | 7,000,000 |  |  |
Unrecognized tax benefitt, net amount if recognized would favorably affect the effective tax rate | 700,000 |  |  |
Expected change in unrecognized tax benefits reduction of taxes payable | 26,000 |  |  |
Provisional assessments, includes taxes, penalties and interest related to withholding taxes | 2,600,000 |  |  |
Additional provisional assessment | 5,300,000 |  |  |
Income taxes receivable | 16,895,000 | 16,778,000 |  |
Income tax interest and/or penalties accrued | $ 214,000 | 370,000 |  |
Colombia Subsidiary [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Favorable tax impact | 1.40% |  |  |
Barbados Subsidiary [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Favorable tax impact | 1.30% |  |  |
Federal and State Jurisdicition [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Effective income tax rate change | 0.90% |  |  |
Operating loss carryforwards | $ 3,400,000 | $ 5,500,000 |  |
Unknown Country [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Deferred tax assets, net | 2,000,000 |  |  |
Income taxes receivable | $ 4,300,000 |  |  |

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