Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	May 30, 2020	Aug. 31, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 381	$ 160
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Capital stock common, par value (in dollars per share)	$ 0.50	$ 0.50
Capital stock common, shares authorized (in shares)	60,000,000	60,000,000
Capital stock common, shares issued (in shares)	51,776,000	51,776,000
Treasury stock, at cost, shares (in shares)	18,146,000	20,262,000