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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
May 31, 2021
May 31, 2020
May 31, 2021
May 31, 2020
Statement Of Income And Comprehensive Income [Abstract]        
Other comprehensive income (loss), tax expense $ 127 $ 297 $ 115 $ 670