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Note 17 - Income Taxes (Details Textual) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Income Before Taxes, Percent	24.00%	26.00%	31.00%
Effective Income Tax Rate Reconciliation, Percent	13.00%	5.00%	13.00%
Increase Decrease In Currentl Tax Expense Due To Nondectible Expenses	$ 1.7
Increase (Decrease) In Current Tax Expense Due to Estimate of Uncertain Tax Positions	0.7
Increase (Decrease) In Current Tax Expense Due To Income Tax of Previous Periods	0.5
Undistributed Earnings of Foreign Subsidiaries	188.6
Liability for Uncertainty in Income Taxes, Noncurrent	6.4
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	6.0
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ (0.3)

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- Definition

Income tax expense expressed as a percentage of income before taxes.

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The increase (decrease) in current income tax expense during the period attributable to increase in uncertain tax positions.

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The increase (decrease) in current income tax expense during the period attributable to increase in income tax of previous periods.

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The increase (decrease) in current income tax expense during the period attributable to increase in nondectible expenses.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

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Amount recognized for uncertainty in income taxes classified as noncurrent.

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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