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Computation of Earnings Per Share - Calculation of Basic and Diluted Common Shares Outstanding (Detail) - shares	3 Months Ended		6 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Earnings Per Share [Abstract]
Weighted-Average Shares of Common Stock Outstanding	32,297,313	33,431,315	32,459,801	33,581,970
Assumed Exercise of Outstanding Dilutive Options	175,755	239,969	177,256	245,200
Less Shares Repurchased from Proceeds of Assumed Exercised Options	(72,822)	(92,198)	(75,674)	(95,378)
Restricted Stock and Restricted Stock Units	69,587	136,950	76,924	121,911
Weighted-Average Common Stock and Dilutive Securities Outstanding	32,469,833	33,716,036	32,638,307	33,853,703
Shares Excluded Due to Anti-Dilution Effects, Including Contingent Awards	41,982	4,701	34,392	3,332

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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.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met.

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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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