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Acquisitions (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Aug. 27, 2011 | Aug. 28, 2010 | Aug. 29, 2009
Finite-Lived Intangible Assets [Line Items] |  |  |
Total intangible assets and goodwill acquired | $ 26,367 | $ 17,113 |
Series of Individually Immaterial Business Acquisitions [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Number of businesses acquired | 9 | 9 | 12
Tangible assets acquired | 6,189 | 3,795 | 467
Intangible assets and goodwill acquired | 26,367 | 17,113 | 4,263
Acquisition of businesses | 32,556 | 20,908 | 4,730
US and Canadian Rental and Cleaning Segment [Member] |  |  |
Goodwill [Line Items] |  |  |
Balance at end of period | 16,014 | 10,584 |
Customer Contracts [Member] |  |  |
Goodwill [Line Items] |  |  |
Balance at end of period | 9,588 | 6,008 |
Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life in Years | 14.4 | 15.0 |
Other Intangible Assets [Member] |  |  |
Goodwill [Line Items] |  |  |
Balance at end of period | $ 765 | $ 521 |
Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life in Years | 5.1 | 5.0 |

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- Definition The aggregate amount assigned to a major class of finite-lived intangible assets acquired either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 44 -Subparagraph a(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16265-109275 + Details
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- Definition The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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