Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Nov. 24, 2018	Aug. 25, 2018
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 179	$ 197
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Capital stock common, par value	$ 0.50	$ 0.50
Capital stock common, shares authorized	60,000,000	60,000,000
Capital stock common, shares issued	51,776,000	51,776,000
Treasury stock, at cost, shares	20,178,000	20,183,000