Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Reconciliation of expected to actual income tax expense
Federal income tax expense at 34% in 2013, 35% in 2012 and 34% in 2011	$ 4,598	$ 12,016	$ 2,310
Changes in tax rates	23	(7)	131
Permanent differences	(741)	347	(300)
Foreign effective tax rate differential	(3,092)	(2,574)	(1,149)
Potential tax, penalties and interest resulting from uncertain tax positions	(5,059)	529	279
Undistributed earnings of foreign affiliates		(435)	646
Foreign withholding taxes		268	122
Other	744	(135)	26
Income tax (benefit) expense	$ (3,527)	$ 10,009	$ 2,065

Income tax reconciliation foreign withholding taxes.

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Income tax reconciliation permanent differences.

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Income tax reconciliation potential tax penalties and interest resulting from uncertain tax positions.

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- Definition

Income tax reconciliation undistributed earnings of foreign affiliates.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to pretax Income or Loss from continuing operations; income tax expense or benefit may include interest and penalties on tax uncertainties based on the entity's accounting policy.

+ References

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

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- Definition

The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to changes in the income tax rates under enacted tax laws in the period.

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The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to total foreign income tax expense or benefit. The foreign income tax expense or benefit difference represents the income tax expense or benefit at applicable domestic statutory income tax rates applied to foreign earnings or loss for the period versus the foreign income tax expense or benefit calculated by applying the appropriate foreign tax rates.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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The portion of the difference, between total income tax expense or benefit as reported in the Income Statement for the year/accounting period and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations, that is attributable to all other items not otherwise listed in the existing taxonomy.

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