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Note 9 - Accrued Liabilities (Tables) | 12 Months Ended
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Aug. 31, 2013
Accrued Liabilities [Abstract] |
Schedule of Accrued Liabilities [Table Text Block] |
|  | August 31, 2013 |  | August 25, 2012
Current liabilities: |  |  |  |  |  |  |  |  |  |
Payroll and benefit related |  | $ | 39,119 |  |  |  | $ | 31,825 |  |
Insurance related |  |  | 36,095 |  |  |  |  | 35,374 |  |
Environmental related |  |  | 5,158 |  |  |  |  | 5,100 |  |
Other |  |  | 6,622 |  |  |  |  | 5,875 |  |
|  | $ | 86,994 |  |  |  | $ | 78,174 |  |
Long-term liabilities: |  |  |  |  |  |  |  |  |  |
Benefit related |  | $ | 19,719 |  |  |  | $ | 18,380 |  |
Environmental related |  |  | 14,522 |  |  |  |  | 14,920 |  |
Asset retirement obligations |  |  | 10,796 |  |  |  |  | 10,120 |  |
|  | $ | 45,037 |  |  |  | $ | 43,420 |  |
Total accrued liabilities |  | $ | 132,031 |  |  |  | $ | 121,594 |  |

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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