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Acquisitions (Detail Textuals) (Salvage vehicle auction business in Brazil and auction platform in Germany, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013
Business Acquisition [Line Items]
Aggregate purchase price consideration	34,933
Covenants not to compete | Minimum
Business Acquisition [Line Items]
Useful life of intangible assets	5 years
Covenants not to compete | Maximum
Business Acquisition [Line Items]
Useful life of intangible assets	8 years
Supply contracts | Minimum
Business Acquisition [Line Items]
Useful life of intangible assets	5 years
Supply contracts | Maximum
Business Acquisition [Line Items]
Useful life of intangible assets	8 years
Trade name | Minimum
Business Acquisition [Line Items]
Useful life of intangible assets	5 years
Trade name | Maximum
Business Acquisition [Line Items]
Useful life of intangible assets	8 years
Licenses and databases | Minimum
Business Acquisition [Line Items]
Useful life of intangible assets	5 years
Licenses and databases | Maximum
Business Acquisition [Line Items]
Useful life of intangible assets	8 years
Software | Minimum
Business Acquisition [Line Items]
Useful life of intangible assets	5 years
Software | Maximum
Business Acquisition [Line Items]
Useful life of intangible assets	8 years

X

- 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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

Name:	us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration