Consolidated Balance Sheets (Parenthetical) - $ / shares	Aug. 25, 2018	Aug. 26, 2017
Statement of Financial Position [Abstract]
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	27,530,000	28,735,000
Common stock, shares outstanding	25,742,000	27,833,000