CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Aug. 31, 2021	Aug. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ (5,553)	$ (9,597)
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	129,060,664	129,060,664
Common stock, shares outstanding	120,586,589	119,220,905
Treasury stock, shares	8,474,075	9,839,759