Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jul. 10, 2011	Oct. 03, 2010
Stockholders' equity:
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	15,000,000	15,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	175,000,000	175,000,000
Common stock, shares issued	74,888,758	74,461,632
Treasury stock at cost, shares	28,109,052	21,640,400