Condensed Consolidated Statements Of Shareholders' Equity - USD ($) $ in Thousands	Class A Common Stock [Member] Common Stock [Member]	Class A Common Stock [Member] Retained Earnings [Member] Regular Dividends [Member]	Class A Common Stock [Member] Retained Earnings [Member] Special Dividends [Member]	Class A Common Stock [Member] Treasury Stock [Member]	Class A Common Stock [Member]	Class B Common Stock [Member] Common Stock [Member]	Class B Common Stock [Member] Retained Earnings [Member] Regular Dividends [Member]	Class B Common Stock [Member] Retained Earnings [Member] Special Dividends [Member]	Class B Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance, Value at Aug. 31, 2019	$ 46					$ 10				$ 659,226	$ 946,651	$ (22,776)	$ (104,607)		$ 5,329
Foreign Currency Translation Adjustment												(2,806)			(441)	$ (3,247)
Net Income											198,621				501	198,621
Associate Incentive Plans	1									26,756			3,254
Repurchase of Class A common stock, Value				$ (3,236)	$ (3,236)
Exchange of Class B common stock for Class A common stock, value
Cash dividends declared on common stock		$ (102,068)	$ (226,984)				$ (22,783)	$ (50,650)
Dividend equivalents declared, net of cancellations											(3,752)
Balance, Value at May. 30, 2020	47					10				685,982	739,035	(25,582)	(104,589)	$ 1,294,903	5,389	1,300,292
Dividends declared per common share					$ 7.25				$ 7.25
Balance, Value at Feb. 29, 2020	47					10				681,657	703,396	(22,053)	(105,758)		5,514
Foreign Currency Translation Adjustment												(3,529)			(536)	(4,065)
Net Income											77,703				411	77,703
Associate Incentive Plans										4,325			1,197
Repurchase of Class A common stock, Value				(28)	$ (28)
Exchange of Class B common stock for Class A common stock, value
Cash dividends declared on common stock		(34,129)					(7,541)
Dividend equivalents declared, net of cancellations											(394)
Balance, Value at May. 30, 2020	47					10				685,982	739,035	(25,582)	(104,589)	1,294,903	5,389	1,300,292
Dividends declared per common share					$ 0.75				0.75
Balance, Value at Aug. 29, 2020	47					10				690,739	749,515	(21,418)	(103,948)		5,628	1,320,573
Foreign Currency Translation Adjustment												6,638			509	7,147
Net Income											150,973				1,087	150,973
Associate Incentive Plans										44,908			2,604
Repurchase and retirement of Class A common stock, Value										(85)	(47,008)
Repurchase of Class A common stock, Value				(3,607)
Exchange of Class B common stock for Class A common stock, value	1					(1)
Cash dividends declared on common stock		(105,195)	$ (163,511)				(20,512)	$ (31,840)
Dividend equivalents declared, net of cancellations											(3,656)
Balance, Value at May. 29, 2021	48					9				735,562	528,766	(14,780)	(104,951)	1,144,654	7,224	1,151,878
Dividends declared per common share					5.75				5.75
Balance, Value at Feb. 27, 2021	48					9				712,750	523,757	(18,806)	(105,645)		6,424
Foreign Currency Translation Adjustment												4,026			299	4,325
Net Income											94,434				501	94,434
Associate Incentive Plans										22,897			782
Repurchase and retirement of Class A common stock, Value										(85)	(47,008)
Repurchase of Class A common stock, Value				$ (88)
Exchange of Class B common stock for Class A common stock, value
Cash dividends declared on common stock		$ (35,387)					$ (6,635)
Dividend equivalents declared, net of cancellations											(395)
Balance, Value at May. 29, 2021	$ 48					$ 9				$ 735,562	$ 528,766	$ (14,780)	$ (104,951)	$ 1,144,654	$ 7,224	$ 1,151,878
Dividends declared per common share					$ 0.75				$ 0.75