Earnings Per Share (Computation of basic and diluted earnings per share) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Numerator For Basic And Diluted Earnings Per Share [Abstract]
Net income (loss)	$ 9,579	$ 8,515	$ 26,267	$ 17,970
Denominators [Abstract]
Weighted Average Number Of Shares Outstanding Basic	19,451	19,313	19,406	19,256
Effect of dilutive employee stock options and other share-based awards	$ 246	$ 175	$ 214	$ 270
Weighted Average Number Of Diluted Shares Outstanding	19,697	19,488	19,620	19,526

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

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+ Details

- Definition

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.

+ References+ Details

- Definition

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.

+ References

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-Glossary Weighted-Average Number of Common Shares Outstanding

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