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Summary of Significant Accounting Policies (Concentration of Risk) (Details) - Sales Revenue, Goods, Net [Member] - Customer Concentration Risk [Member] | 12 Months Ended
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Aug. 29, 2015 dealerships states | Aug. 30, 2014 | Aug. 31, 2013
Dealer 1 [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percent of revenue | 17.90% | 19.70% | 26.50%
Number of dealerships (in dealerships) | dealerships | 75 |  |
Number of states (in states) | 28 |  |
Dealer 2 [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percent of revenue | 15.00% | 12.30% |
Number of dealerships (in dealerships) | dealerships | 11 |  |
Number of states (in states) | 4 |  |

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611 + Details
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