Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Other comprehensive loss, tax (benefit) expense	$ (929)	$ 467	$ 267

Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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+ Details