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Calculation of Basic and Diluted Common Shares Outstanding (Detail) - shares	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share [Abstract]
Weighted Average Shares of Common Stock Outstanding	47,690,351	48,121,890
Assumed Exercise of Outstanding Dilutive Options	829,873	1,259,741
Less Shares Repurchased from Proceeds of Assumed Exercised Options	(571,799)	(928,723)
Restricted Stock Units	195,900	202,645
Weighted Average Common Stock and Dilutive Securities Outstanding	48,144,325	48,655,553
Shares Excluded Due to Anti-dilution Effects	145,488	63,359

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- Definition

Shares repurchased from assumed proceeds of assumed exercised options.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
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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 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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Number of shares of restricted stock determined by relating the portion of time within a reporting period that restricted shares have been outstanding to the total time in that period. Restricted shares are subject to sales, contractual, regulatory or other restrictions that prevent or inhibit the holder from freely disposing of them before the restriction ends.

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