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Condensed Consolidated Statements Of Comprehensive Income (Loss) (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Feb. 28, 2018
Feb. 28, 2017
Feb. 28, 2018
Feb. 28, 2017
Statement Of Income And Comprehensive Income [Abstract]        
Other comprehensive income, tax (benefit) expense $ (306) $ 87 $ (274) $ 653