CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
STATEMENTS OF EQUITY
Cash dividends paid per share (in dollars per share)	$ 0.80	$ 0.80	$ 0.80
Change in funded status of pension plans, tax	$ (215)	$ 218	$ 130
Net unrealized gain (loss) on restricted investments, tax	$ 40	$ (5)	$ 2
Cash dividend on common stock per share (in dollars per share)	$ 0.80	$ 0.80	$ 0.80