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Acquisitions (Details) (Salvage vehicle auction business and online marketing company, USD $) In Thousands, unless otherwise specified	Jan. 31, 2014	Jan. 31, 2013
Salvage vehicle auction business and online marketing company
Business Acquisition [Line Items]
Total cash paid, net of cash acquired	$ 14,228	$ 31,243
Contingent consideration	533	3,690
Total acquisition price	$ 14,761	$ 34,933

X

- Definition

The total cash paid to shareholders of acquired entities net of cash acquired.

+ References

No definition available.

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X

- Definition

Amount of asset recognized arising from contingent consideration in a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 35

-Paragraph 1

-Subparagraph b

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Section 25

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- Definition

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

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-Publisher FASB

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-Topic 805

-SubTopic 10

-Section 55

-Paragraph 37

-URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464

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