Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Aug. 29, 2015

Accounting Policies [Abstract]

Schedule of Inventory, Current [Table Text Block]

	August 29, 2015		August 30, 2014
Raw materials	$	17,658	$	19,053
Work in process		2,415		3,759
Finished goods		60,376		56,046
Total inventories	$	80,449	$	78,858

Property, Plant and Equipment [Table Text Block]

Buildings (in years)	30	-	40
Building components (in years)	10	-	20
Leasehold improvements	Shorter of useful life or term of lease
Machinery and equipment (in years)	3	-	10
Motor vehicles (in years)	3	-	5

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Fiscal year ended August	2015			2014			2013
Risk-free interest rate		1.92	%		1.90	%		1.24	%
Expected dividend yield		0.27	%		0.27	%		0.41	%
Expected life in years		7.44			7.45			7.42
Expected volatility		32.2	%		32.9	%		33.4	%

Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table Text Block]

Year ended	August 29, 2015		August 30, 2014		August 31, 2013
Net income available to shareholders	$	124,299	$	119,925	$	116,685
Allocation of net income for Basic:
Common Stock	$	98,665	$	94,849	$	91,916
Class B Common Stock		24,761		23,705		22,913
Unvested participating shares		873		1,371		1,856
	$	124,299	$	119,925	$	116,685
Weighted average number of shares for Basic:
Common Stock		15,182		15,080		14,975
Class B Common Stock		4,763		4,711		4,666
Unvested participating shares		153		249		345
		20,098		20,040		19,986
Earnings per share for Basic:
Common Stock	$	6.50	$	6.29	$	6.14
Class B Common Stock	$	5.20	$	5.03	$	4.91

Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table Text Block]

	Year Ended August 29, 2015							Year Ended August 30, 2014							Year Ended August 31, 2013
	Earnings							Earnings							Earnings
	to Common			Common				to Common			Common				to Common			Common
	shareholders			Shares		EPS		shareholders			Shares		EPS		shareholders			Shares		EPS
As reported – Basic	$	98,665			15,182	$	6.50		94,849			15,080	$	6.29	$	91,916			14,975	$	6.14
Add: effect of dilutive potential common shares
Share-Based Awards		—			134				—			148				—			148
Class B Common Stock		24,761			4,763				23,705			4,711				22,913			4,666
Add: Undistributed earnings allocated to unvested participating shares		853			—				1,339			—				1,810			—
Less: Undistributed earnings reallocated to unvested participating shares		(807	)		—				(1,267	)		—				(1,712	)		—
Diluted EPS – Common Stock	$	123,472			20,079	$	6.15		118,626			19,939	$	5.95	$	114,927			19,789	$	5.81