Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Aug. 31, 2018	Aug. 31, 2017	Aug. 31, 2018	Aug. 31, 2017
Numerator:
Net income for basic and diluted earnings per common share	$ 11,244	$ 9,786	$ 26,962	$ 21,848
Denominator:
Denominator for basic earnings per common share-weighted average shares (shares)	26,019	25,970	26,001	25,991
Effect of dilutive securities:
Employee and Director stock awards (shares)	72	66	61	74
Denominator for diluted earnings per common share (shares)	26,091	26,036	26,062	26,065
Earnings per share basic and diluted:
Basic earnings per Common share (usd per share)	$ 0.43	$ 0.38	$ 1.04	$ 0.84
Diluted earnings per common share (usd per share)	$ 0.43	$ 0.38	$ 1.03	$ 0.84

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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