Earnings Per Share and Stock Plans (Schedule of Earnings Per Share) (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Numerator for basic and diluted earnings per share:
Net income	$ 22,065	$ 8,984	$ 19,579
Denominators:
Average basic shares outstanding	22,841	20,591	20,079
Effect of dilutive employee stock options, RSU's and performance shares	494	297	236
Average diluted shares outstanding	23,335	20,888	20,315

-- None. No documentation exists for this element. --

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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 consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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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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