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	385			(385)
Exercise of common stock options, including income tax benefits of $4,822, Shares	472										472
Exercise of common stock options, including income tax benefits of $4,822, Value	1						24,387				24,388
Common stock issued under associate stock purchase plan, Shares										(40)
Common stock issued under associate stock purchase plan, Value							1,105			1,525	2,630
Grant of restricted common stock, net of cancellations, Shares	90
Stock-based compensation							11,410				11,410
Purchase of treasury stock, Shares										670	670
Purchase of treasury stock, Value										(47,986)	(47,986)
Cash dividends paid on common stock		(35,202)	(35,202)		(12,139)	(12,139)
Issuance of dividend equivalent units							143	(143)
Cumulative translation adjustment									(505)		(505)
Net income								190,116			190,116
Balance, Value at May. 26, 2012	$ 52			$ 16			$ 476,080	$ 917,781	$ (2,590)	$ (265,515)	$ 1,125,824
Balance, Shares at May. 26, 2012	52,070			16,015						5,353