Consolidated Statement Of Shareholders' Equity (USD $) In Thousands, except Share data	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. 29, 2009	$ 47			$ 18			$ 336,092	$ 577,321	$ (2,068)	$ (105,874)	$ 805,536
Balance, Shares at Aug. 29, 2009	46,869,000			18,390,000						2,621,000
Exchange of Class B common stock for Class A common stock, Shares	465,000			(465,000)
Exercise of common stock options, including income tax benefits, Value	1						28,409				28,410
Exercise of common stock options, including income tax benefits, Shares	877,000										879,000
Common stock issued under associate stock purchase plan, Value							289			2,309	2,598
Common stock issued under associate stock purchase plan, Shares										(61,000)
Grant of restricted common stock, net of cancellations, Shares	169,000
Stock-based compensation							13,525				13,525
Purchase of treasury stock, Value										(48,244)	(48,244)
Purchase of treasury stock, Shares										968,000
Cash dividends paid on common stock		(36,730)	(36,730)		(14,996)	(14,996)
Net income								150,373			150,373
Cumulative foreign currency translation adjustment									(592)		(592)
Balance, Value at Aug. 28, 2010	48			18			378,315	675,968	(2,660)	(151,809)	899,880
Balance, Shares at Aug. 28, 2010	48,380,000			17,925,000						3,528,000
Exchange of Class B common stock for Class A common stock, Value	2			(2)
Exchange of Class B common stock for Class A common stock, Shares	1,525,000			(1,525,000)
Exercise of common stock options, including income tax benefits, Value	1						44,655				44,656
Exercise of common stock options, including income tax benefits, Shares	1,060,000										1,060,000
Common stock issued under associate stock purchase plan, Value							949			2,034	2,983
Common stock issued under associate stock purchase plan, Shares										(53,000)
Grant of restricted common stock, net of cancellations, Shares	158,000
Stock-based compensation							14,768				14,768
Purchase of treasury stock, Value			(69,279)							(69,279)	(69,279)
Purchase of treasury stock, Shares			1,248,000							1,248,000
Cash dividends paid on common stock		(86,234)	(86,234)		(33,023)	(33,023)
Issuance of dividend equivalent units							348	(348)
Net income								218,786			218,786
Cumulative foreign currency translation adjustment									575		575
Balance, Value at Aug. 27, 2011	51			16			439,035	775,149	(2,085)	(219,054)	993,112
Balance, Shares at Aug. 27, 2011	51,123,000			16,400,000						4,723,000
Exchange of Class B common stock for Class A common stock, Value	1										1
Exchange of Class B common stock for Class A common stock, Shares	840,000			(840,000)
Exercise of common stock options, including income tax benefits, Value	1						27,797				27,798
Exercise of common stock options, including income tax benefits, Shares	538,000										538,000
Common stock issued under associate stock purchase plan, Value							1,397			1,990	3,387
Common stock issued under associate stock purchase plan, Shares										(52,000)
Grant of restricted common stock, net of cancellations, Shares	81,000
Stock-based compensation							15,262				15,262
Purchase of treasury stock, Value			(48,098)							(48,098)	(48,098)
Purchase of treasury stock, Shares			671,000							671,000
Cash dividends paid on common stock		(46,926)	(46,926)		(16,098)	(16,098)
Issuance of dividend equivalent units							191	(191)
Net income								259,031			259,031
Cumulative foreign currency translation adjustment									(358)		(358)
Balance, Value at Sep. 01, 2012	$ 53			$ 16			$ 483,682	$ 970,965	$ (2,443)	$ (265,162)	$ 1,187,111
Balance, Shares at Sep. 01, 2012	52,582,000			15,560,000						5,342,000