Condensed Consolidated Statement Of Shareholders' Equity (USD $) In Thousands	Class A Common Stock [Member] Common Stock [Member]	Class A Common Stock [Member] Retained Earnings [Member]	Class A Common Stock [Member]	Class B Common Stock [Member] Common Stock [Member]	Class B Common Stock [Member] Retained Earnings [Member]	Class B Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Class A Treasury Stock [Member]	Total
Balance, Value at Aug. 27, 2011	$ 51			$ 16			$ 439,035	$ 775,149	$ (2,085)	$ (219,054)	$ 993,112
Balance, Shares at Aug. 27, 2011	51,123			16,400						4,723
Exchange of Class B common stock for Class A common stock, Shares	100			(100)
Exercise of common stock options, including income tax benefits of $2,532, Shares	248										248
Exercise of common stock options, including income tax benefits of $2,532, Value	1						13,098				13,099
Common stock issued under associate stock purchase plan, Shares										(12)
Common stock issued under associate stock purchase plan, Value							279			460	739
Grant of restricted common stock, net of cancellations, Shares	113
Stock-based compensation							3,828				3,828
Purchase of treasury stock, Shares										51
Purchase of treasury stock, Value										(3,331)	(3,331)
Cash dividends paid on common stock		(11,646)	(11,646)		(4,100)	(4,100)
Issuance of dividend equivalent units							47	(47)
Cumulative translation adjustment									(692)		(692)
Net income								59,837			59,837
Comprehensive income											59,145
Balance, Value at Nov. 26, 2011	$ 52			$ 16			$ 456,287	$ 819,193	$ (2,777)	$ (221,925)	$ 1,050,846
Balance, Shares at Nov. 26, 2011	51,584			16,300						4,762