Condensed Consolidated Statement Of Shareholders' Equity - 6 months ended Mar. 04, 2017 - USD ($) shares in Thousands, $ in Thousands	Restricted Stock Units [Member] Class A Common Stock [Member]	Restricted Stock Units [Member] Additional Paid-In Capital [Member]	Restricted Stock Units [Member]	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 Sep. 03, 2016				$ 53			$ 12			$ 584,017	$ 1,040,148	$ (19,098)	$ (506,756)	$ 1,098,376
Balance, Shares at Sep. 03, 2016						52,993			11,933				8,345
Exchange of Class B common stock for Class A common stock, Shares						82			(82)
Exercise of common stock options, Shares						329								329
Exercise of common stock options, Value										22,097				$ 22,097
Common stock issued under associate stock purchase plan, Shares													(28)
Common stock issued under associate stock purchase plan, Value										1,137			$ 1,059	2,196
Issuance of restricted common stock, net of cancellations, Shares						(4)
Shares issued from restricted stock units, including dividend equivalent units, Value		$ 77	$ 77
Shares issued from restricted stock units, including dividend equivalent units, Shares	45
Stock-based compensation										6,925				6,925
Repurchases of common stock, Shares													42
Repurchases of common stock, Value													$ (3,064)	(3,064)
Cash dividends on common stock					$ (40,307)	$ (40,307)		$ (10,703)	$ (10,703)
Dividend equivalent units declared, net of cancellations											(275)			(275)
Foreign currency translation adjustment												(2,248)		(2,248)
Net income											107,847			107,847
Balance, Value at Mar. 04, 2017				$ 53			$ 12			$ 614,253	$ 1,096,710	$ (21,346)	$ (508,761)	$ 1,180,921
Balance, Shares at Mar. 04, 2017						53,445			11,851				8,359