Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Aug. 27, 2016

Notes Tables

Schedule of Inventory, Current [Table Text Block]

	August 27, 2016		August 29, 2015
Raw materials	$	16,826	$	17,658
Work in process		2,275		2,415
Finished goods		59,786		60,376
Total inventory	$	78,887	$	80,449

Property, Plant and Equipment [Table Text Block]

	August 27, 2016		August 29, 2015
Land, buildings and leasehold equipment	$	432,716	$	402,781
Machinery and equipment		569,627		535,698
Motor vehicles		198,770		193,643
		1,201,113		1,132,122
Less: accumulated depreciation		661,295		618,269
Total property, plant and equipment	$	539,818	$	513,853

Useful Life of 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	2016			2015			2014
Risk-free interest rate		1.76	%		1.92	%		1.90	%
Expected dividend yield		0.25	%		0.27	%		0.27	%
Expected life in years		7.40			7.44			7.45
Expected volatility		29.3	%		32.2	%		32.9	%

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

Year ended	August 27, 2016		August 29, 2015		August 30, 2014
Net income available to shareholders	$	125,026	$	124,299	$	119,925
Allocation of net income for Basic:
Common Stock	$	99,282	$	98,665	$	94,849
Class B Common Stock		25,093		24,761		23,705
Unvested participating shares		651		873		1,371
	$	125,026	$	124,299	$	119,925
Weighted average number of shares for Basic:
Common Stock		15,245		15,182		15,080
Class B Common Stock		4,816		4,763		4,711
Unvested participating shares		107		153		249
		20,168		20,098		20,040
Earnings per share for Basic:
Common Stock	$	6.51	$	6.50	$	6.29
Class B Common Stock	$	5.21	$	5.20	$	5.03

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

	Year Ended August 27, 2016							Year Ended August 29, 2015							Year Ended August 30, 2014
	Earnings							Earnings							Earnings
	to Common			Common				to Common			Common				to Common			Common
	shareholders			Shares		EPS		shareholders			Shares		EPS		shareholders			Shares		EPS
As reported – Basic	$	99,282			15,245	$	6.51		98,665			15,182	$	6.50	$	94,849			15,080	$	6.29
Add: effect of dilutive potential common shares
Share-Based Awards		—			93				—			134				—			148
Class B Common Stock		25,093			4,816				24,761			4,763				23,705			4,711
Add: Undistributed earnings allocated to unvested participating shares		636			—				853			—				1,339			—
Less: Undistributed earnings reallocated to unvested participating shares		(602	)		—				(807	)		—				(1,267	)		—
Diluted EPS – Common Stock	$	124,409			20,154	$	6.17		123,472			20,079	$	6.15	$	118,626			19,939	$	5.95