Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Aug. 25, 2012	Aug. 27, 2011
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares issued
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	39,869	44,084
Common stock, shares outstanding	37,028	40,109