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Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands | Aug. 31, 2018 | Aug. 31, 2017
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Income Tax Disclosure [Abstract] |  |
Deferred Tax Assets, Allowance for doubtful accounts | $ 947 | $ 2,084
Deferred Tax Assets, Accrued expenses | 8,142 | 12,459
Deferred Tax Assets, Warranty | 1,648 | 2,957
Deferred Tax Assets, Defined benefit pension plan | 1,528 | 2,666
Deferred Tax Assets, Inventory | 1,935 | 1,923
Deferred Tax Assets, Share-based compensation | 925 | 1,578
Deferred Tax Assets, Vacation | 797 | 1,422
Deferred Tax Assets, Net operating loss and capital loss carryforwards | 2,868 | 1,420
Deferred Tax Assets, Deferred revenue | 536 | 793
Deferred Tax Assets, Other | 665 | 964
Gross deferred tax assets | 19,991 | 28,266
Deferred Tax Assets, Valuation allowance | (3,562) | (2,804)
Net deferred tax assets | 16,429 | 25,462
Deferred Tax Liabilities, Intangible assets | (6,648) | (15,422)
Deferred Tax Liabilities, Property, plant and equipment | (4,219) | (5,920)
Total deferred tax liabilities | (10,867) | (21,342)
Net deferred tax assets | $ 5,562 | $ 4,120

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