CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	Nov. 30, 2020	Aug. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 8,407	$ 9,597
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares outstanding	120,068,021	119,220,905
Treasury stock, shares	8,992,643	9,839,759