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Note 8. Commitments and Contingencies (Tables) | 9 Months Ended
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May 25, 2013
Commitments and Contingencies Disclosure [Abstract] |
Schedule Of Environmental Liabilities [TableTextBlock] |
|  | May 25, 2013 |
Beginning balance as of August 25, 2012 |  | $ | 20,020 |
Payments made for which reserves had been provided |  |  | (1,478 | )
Insurance proceeds received |  |  | 163 |
Interest accretion |  |  | 407 |
Change in discount rates |  |  | (702 | )
Balance as of May 25, 2013 |  | $ | 18,410 |
Schedule Of Environmental Remediation Liabilities [Table Text Block] |
(In thousands) |  | 2013 |  |  | 2014 |  |  | 2015 |  |  | 2016 |  |  | 2017 |  |  | Thereafter |  |  | Total |
Estimated costs – current dollars |  | $ | 3,785 |  |  | $ | 2,470 |  |  | $ | 1,437 |  |  | $ | 950 |  |  | $ | 752 |  |  | $ | 11,861 |  |  | $ | 21,255 |
Estimated insurance proceeds |  |  | — |  |  |  | (173 | ) |  |  | (159 | ) |  |  | (173 | ) |  |  | (159 | ) |  |  | (1,743 | ) |  |  | (2,407 | )
Net anticipated costs |  | $ | 3,785 |  |  | $ | 2,297 |  |  | $ | 1,278 |  |  | $ | 777 |  |  | $ | 593 |  |  | $ | 10,118 |  |  | $ | 18,848 |
Effect of inflation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,109 |
Effect of discounting |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (7,547 | )
Balance as of May 25, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 18,410 |

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- Definition Tabular disclosure of the components of the environmental liabilities as of period end. + References No definition available. + Details
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- Definition Tabular disclosure of environmental remediation costs less estimated insurance proceeds including the effects of inflation and discounting the costs to present value. + References No definition available. + Details
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Namespace Prefix: | unf_
Data Type: | nonnum:textBlockItemType
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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
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