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	360			(360)
Exercise of common stock options, including income tax benefits of $4,168, Shares	408										408
Exercise of common stock options, including income tax benefits of $4,168, Value	1						20,978				20,979
Common stock issued under associate stock purchase plan, Shares										(28)
Common stock issued under associate stock purchase plan, Value							742			1,039	1,781
Grant of restricted common stock, net of cancellations, Shares	100
Stock-based compensation							7,571				7,571
Purchase of treasury stock, Shares										53
Purchase of treasury stock, Value										(3,439)	(3,439)
Cash dividends paid on common stock		(23,387)	(23,387)		(8,135)	(8,135)
Issuance of dividend equivalent units							95	(95)
Cumulative translation adjustment									(373)		(373)
Net income								119,905			119,905
Comprehensive income											119,532
Balance, Value at Feb. 25, 2012	$ 52			$ 16			$ 468,421	$ 863,437	$ (2,458)	$ (221,454)	$ 1,108,014
Balance, Shares at Feb. 25, 2012	51,991			16,040						4,748