Note 1 - Components of Property, Plant and Equipment (Details) - USD ($)	Aug. 27, 2016		Aug. 29, 2015
Land, Building and Leasehold Equipment [Member]
Property, Plant and Equipment, Gross	$ 432,716,000		$ 402,781,000
Machinery and Equipment [Member]
Property, Plant and Equipment, Gross	569,627,000		535,698,000
Vehicles [Member]
Property, Plant and Equipment, Gross	198,770,000		193,643,000
Property, Plant and Equipment, Gross	1,201,113,000		1,132,122,000
Less: accumulated depreciation	661,295,000		618,269,000
Total property, plant and equipment	$ 539,818,000	[1]	$ 513,853,000

[1] In the second fiscal quarter of 2016, the Company adopted updated accounting guidance on the presentation of deferred income taxes. This adoption required that deferred tax liabilities and assets be classified as noncurrent in the Consolidated Balance Sheet. The Company elected to account for this change in presentation prospectively and prior periods were not retroactively adjusted.