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. 31, 2013	$ 55			$ 14			$ 528,770	$ 1,132,868	$ (4,427)	$ (266,897)	$ 1,390,383
Balance, Shares at Aug. 31, 2013	54,634			14,141						5,341
Exchange of Class B common stock for Class A common stock, Shares	425			(425)
Exercise of common stock options, including income tax benefits of $4,197, Shares	255										255
Exercise of common stock options, including income tax benefits of $4,197, Value							16,381				16,381
Common stock issued under associate stock purchase plan, Shares										(28)
Common stock issued under associate stock purchase plan, Value							949			1,040	1,989
Issuance of restricted common stock, net of cancellations, Shares	110
Stock-based compensation							9,267				9,267
Purchase of treasury stock, Shares										1,503
Purchase of treasury stock, Value										(115,435)	(115,435)
Cash dividends paid on common stock		(32,172)	(32,172)		(9,258)	(9,258)
Issuance of dividend equivalent units							130	(130)
Foreign currency translation adjustments									(1,834)		(1,834)
Net income								108,558			108,558
Balance, Value at Mar. 01, 2014	$ 55			$ 14			$ 555,497	$ 1,199,866	$ (6,261)	$ (381,292)	$ 1,367,879
Balance, Shares at Mar. 01, 2014	55,424			13,716						6,816