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Basis of Presentation Basis of Presentation (Details) - USD ($) $ in Thousands | Nov. 30, 2017 | Aug. 31, 2017
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Condensed Statement of Income Captions [Line Items] |  |
AOCI - Foreign Currency Translation Adjustment, net of tax | $ 204,906 | $ 207,804
AOCI - Pension and other postretirement benefit plans, net of tax | 19,330 | 19,457
Total shareholders’ equity | 516,318 | 500,539
AOCI Attributable to Parent [Member] |  |
Condensed Statement of Income Captions [Line Items] |  |
Total shareholders’ equity | $ 224,236 | $ 227,261

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