Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Feb. 15, 2014	Aug. 31, 2013
Statement Of Financial Position [Abstract]
Preferred stock, shares authorized	1,000	1,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	33,759	36,768
Common stock, shares outstanding	33,355	34,293