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Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Feb. 29, 2020 | Feb. 23, 2019 | Feb. 29, 2020 | Feb. 23, 2019
Statement of Stockholders' Equity [Abstract] |  |  |  |
Dividends paid per common share (in dollars per share) | $ 0.11 | $ 0.11 | $ 0.22 | $ 0.21
Equity component of convertible senior notes and offering costs, tax |  |  | $ 20,840 |
Convertible note hedge purchase, tax |  |  | $ 17,417 |

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