Number of share based compensation plans

No definition available.

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- Definition

Share based Compensation Arrangement by Share-based Payment Award, Date of Expiration

+ References

No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Maximum Exercise Period

+ References

No definition available.

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- Definition

Share Based Compensation Arrangement, By Share Based Payment Award, Number Of Shares Granted Based On Target Award Percenatge

+ References

No definition available.

+ Details

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- Definition

Share Based Compensation Arrangement, By Share Based Payment Award, Perfromance Shares Target Award

+ References

No definition available.

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph h

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Aggregate unrecognized cost of share-based awards, other than options, made to employees under an equity-based compensation plan, that have yet to vest.

+ References

No definition available.

+ Details

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-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 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(2)

-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.

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- Definition

Net number of share options (or share units) granted during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(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.

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Share Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended		12 Months Ended						12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Aug. 27, 2012	Apr. 02, 2012	Jan. 31, 2013 Plans	Jan. 31, 2012	Jan. 31, 2011	Jan. 31, 2013 2010 Stock Incentive Plan [Member]	May 22, 2012 2010 Stock Incentive Plan [Member]	Jan. 31, 2013 Director [Member]	Jan. 31, 2013 Restricted Stock Units (RSUs) [Member]	Apr. 30, 2012 Time Vested Units [Member] 2010 Stock Incentive Plan [Member]	Jan. 31, 2013 Performance Based Restricted Stock Units [Member]	Apr. 30, 2012 Performance Based Restricted Stock Units [Member] 2010 Stock Incentive Plan [Member]	Jan. 31, 2013 Minimum [Member] Performance Based Restricted Stock Units [Member] 2010 Stock Incentive Plan [Member]	Jan. 31, 2013 Maximum [Member] Performance Based Restricted Stock Units [Member] 2010 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement, By Share Based Payment Award, Perfromance Shares Target Award													0.00%	150.00%
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options									$ 1,986
Number of share based compensation plans			2
Stock awards and incentive or non-qualified option term, years			4 years							3 years		3 years
Shares reserved for grant under the plan							2,000,000	100,000
Remaining shares available for grant						1,154,366
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Exercise Period						10 years
Granted, number of options	7,600	151,200	158,800
Intrinsic value of options exercised			2,573	2,362	1,102
Total compensation cost for non-vested awards not yet recognized in the Company's statements of income			$ 3,404
Weighted average period to recognize costs associated with non-vested awards in years			2 years 6 months 29 days						2 years 2 months 1 day
Share based Compensation Arrangement by Share-based Payment Award, Date of Expiration			5 years
Share Based Compensation Arrangement, By Share Based Payment Award, Number Of Shares Granted Based On Target Award Percenatge											100.00%