XML 23 R28.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 4 - Fair Value Measurements (Details) - Fair Value Measurments (USD $) In Thousands, unless otherwise specified | Mar. 01, 2014 | Aug. 31, 2013
--- | --- | ---
Assets: |  |
Total | $ 31,828 | $ 33,325
Fair Value, Inputs, Level 1 [Member] | Cash Equivalents [Member] |  |
Assets: |  |
Cash equivalents | 31,828 | 33,325
Fair Value, Inputs, Level 1 [Member] |  |
Assets: |  |
Total | 31,828 | 33,325
Fair Value, Inputs, Level 2 [Member] | Cash Equivalents [Member] |  |
Assets: |  |
Cash equivalents | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |
Assets: |  |
Total | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Cash Equivalents [Member] |  |
Assets: |  |
Cash equivalents | 0 | 0
Fair Value, Inputs, Level 3 [Member] |  |
Assets: |  |
Total | 0 | 0
Cash Equivalents [Member] |  |
Assets: |  |
Cash equivalents | $ 31,828 | $ 33,325

X
- Details
Name: | unf_AssetsAbstract0
Namespace Prefix: | unf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
Name: | us-gaap_CashAndCashEquivalentsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant