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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) (Parenthetical) - $ / shares
3 Months Ended 6 Months Ended
Feb. 28, 2019
Feb. 28, 2018
Feb. 28, 2019
Feb. 28, 2018
Statement of Stockholders' Equity [Abstract]        
Cash dividends per share (in USD per share) $ 0.12 $ 0.12 $ 0.24 $ 0.24