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Revenue Recognition (Summary of Impacts of ASU on Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands | Feb. 28, 2019 | Sep. 01, 2018 | Aug. 31, 2018 | Feb. 28, 2018
--- | --- | --- | --- | ---
Revenue Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Inventories, net | $ 99,984 |  | $ 79,233 | $ 102,975
Other current assets | 18,196 |  | 7,204 | 6,092
Other current liabilities | 44,825 |  | 46,935 | 57,720
Deferred income tax liabilities | 991 |  | 1,083 | 1,179
Retained earnings | 477,027 |  | 484,886 | $ 476,091
ASC Topic 606 [Member] |  |  |  |
Revenue Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Inventories, net |  | $ 78,291 |  |
Other current assets |  | 8,855 |  |
Other current liabilities |  | 46,949 |  |
Deferred income tax liabilities |  | 1,246 |  |
Retained earnings |  | $ 485,418 |  |
ASC Topic 606 Adjustments [Member] | ASC Topic 606 [Member] |  |  |  |
Revenue Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Inventories, net | 3,734 |  | (942) |
Other current assets | (1,157) |  | 1,651 |
Other current liabilities | 5,503 |  | 14 |
Deferred income tax liabilities |  |  | 163 |
Retained earnings | (2,926) |  | $ 532 |
Balance Without Adoption of ASC Topic 606 [Member] | ASC Topic 606 [Member] |  |  |  |
Revenue Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Inventories, net | 103,718 |  |  |
Other current assets | 17,039 |  |  |
Other current liabilities | 50,328 |  |  |
Retained earnings | $ 474,101 |  |  |

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