Note 9 - Summary of Current and Long-term Accrued Liabilities (Details) - USD ($)	Aug. 27, 2016		Aug. 29, 2015
Payroll and benefit related	$ 47,423,000		$ 48,932,000
Insurance related	25,612,000		40,123,000
Environmental related	9,500,000		7,254,000
Asset retirement obligations	1,275,000
Other	16,972,000		16,713,000
Total current liabilities	100,782,000	[1]	113,022,000
Benefit related	33,966,000		26,132,000
Environmental related	17,247,000		16,053,000
Asset retirement obligations	11,757,000		12,381,000
Insurance related	41,951,000
Total long-term liabilities	104,921,000	[1]	54,566,000
Total accrued liabilities	$ 205,703,000		$ 167,588,000

[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.