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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

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-Paragraph 1

-Subparagraph (c)

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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-Publisher FASB

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-Glossary Investing Activities

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Acquisitions (Details Textuals) (USD $) In Thousands, unless otherwise specified				12 Months Ended								1 Months Ended	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2013 Covenants not to compete	Jul. 31, 2012 Covenants not to compete	Jul. 31, 2013 Supply contracts	Jul. 31, 2012 Supply contracts	Jul. 31, 2013 Customer relationships	Jul. 31, 2013 Trade name	Jul. 31, 2013 Licenses and databases	Jul. 31, 2012 Licenses and databases	Mar. 31, 2011 John Hewitt and Sons, Limited (Hewitt)	Jul. 31, 2013 Salvage vehicle auction business and auction platform	Jul. 31, 2013 Salvage vehicle auction business and auction platform Covenants not to compete Minimum	Jul. 31, 2013 Salvage vehicle auction business and auction platform Covenants not to compete Maximum	Jul. 31, 2013 Salvage vehicle auction business and auction platform Supply contracts Minimum	Jul. 31, 2013 Salvage vehicle auction business and auction platform Supply contracts Maximum	Jul. 31, 2013 Salvage vehicle auction business and auction platform Customer relationships Minimum	Jul. 31, 2013 Salvage vehicle auction business and auction platform Customer relationships Maximum	Jul. 31, 2013 Salvage vehicle auction business and auction platform Trade name Minimum	Jul. 31, 2013 Salvage vehicle auction business and auction platform Trade name Maximum	Jul. 31, 2013 Salvage vehicle auction business and auction platform Licenses and databases Minimum	Jul. 31, 2013 Salvage vehicle auction business and auction platform Licenses and databases Maximum	Jul. 31, 2013 Salvage vehicle auction business and auction platform software Minimum	Jul. 31, 2013 Salvage vehicle auction business and auction platform software Maximum
Business Acquisition [Line Items]
Voting stock													100.00%
Purchase price													$ 87,891
Business acquisition, cost of acquired entity, cash paid												34,900	84,022
Goodwill	$ 267,463	$ 196,438	$ 198,620									$ 19,300
Useful life of intangible assets				4 years	4 years	8 years	6 years	6 years	4 years	3 years	1 year			3 years	8 years	3 years	8 years	3 years	8 years	3 years	8 years	3 years	8 years	3 years	8 years