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Note 9 - Accrued Liabilities (Details) - Summary of current and long term accrued liabilities (USD $) In Thousands, unless otherwise specified | Aug. 31, 2013 | Aug. 25, 2012
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Summary of current and long term accrued liabilities [Abstract] |  |
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
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 Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(1),(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Subparagraph 1, 5 -Article 9 + Details
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