XML 92 R34.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 10 - Commitments and Contingencies (Tables) | 12 Months Ended
--- | ---
Aug. 30, 2014
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] |
2015 |  | $ | 7,720 |
2016 |  |  | 6,151 |
2017 |  |  | 4,498 |
2018 |  |  | 2,897 |
2019 |  |  | 1,689 |
Thereafter |  |  | 1,722 |
|  | $ | 24,677 |
Schedule Of Environmental Liabilities [TableTextBlock] |
Year ended |  | August 30, 2014 |  |  | August 31, 2013 |
Beginning balance |  | $ | 19,680 |  |  | $ | 20,020 |
Costs incurred for which reserves have been provided |  |  | (2,913 | ) |  |  | (1,862 | )
Insurance proceeds |  |  | 687 |  |  |  | 282 |
Interest accretion |  |  | 716 |  |  |  | 542 |
Changes in discount rates |  |  | 1,080 |  |  |  | (1,585 | )
Revisions in estimates |  |  | 596 |  |  |  | 2,283 |
Ending balance |  | $ | 19,846 |  |  | $ | 19,680 |
Schedule Of Environmental Remediation Liabilities [Table Text Block] |
(In thousands) |  | 2015 |  |  | 2016 |  |  | 2017 |  |  | 2018 |  |  | 2019 |  |  | Thereafter |  |  | Total |
Estimated costs – current dollars |  | $ | 5,219 |  |  | $ | 1,915 |  |  | $ | 1,663 |  |  | $ | 745 |  |  | $ | 863 |  |  | $ | 12,407 |  |  | $ | 22,812 |
Estimated insurance proceeds |  |  | (173 | ) |  |  | (159 | ) |  |  | (173 | ) |  |  | (159 | ) |  |  | (173 | ) |  |  | (1,430 | ) |  |  | (2,267 | )
Net anticipated costs |  | $ | 5,046 |  |  | $ | 1,756 |  |  | $ | 1,490 |  |  | $ | 586 |  |  | $ | 690 |  |  | $ | 10,977 |  |  | $ | 20,545 |
Effect of inflation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,075 |
Effect of discounting |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (7,774 | )
Balance as of August 30, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 19,846 |

X
- Definition Tabular disclosure of the components of the environmental liabilities as of period end. + References No definition available. + Details
Name: | unf_ScheduleOfEnvironmentalLiabilitiesTableTextBlock
Namespace Prefix: | unf_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | unf_ScheduleOfEnvironmentalRemediationLiabilitiesTableTextBlock
Namespace Prefix: | unf_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
Name: | us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration