Stock-Based Compensation and Stock Options - Stock Options (Detail) - $ / shares	3 Months Ended
Jun. 30, 2025	Jun. 30, 2024
Share-Based Payment Arrangement [Abstract]
Options outstanding, beginning balance, Shares	1,185,727	1,469,181
Options granted, Shares	45,500	44,250
Options exercised, Shares	(54,889)	(98,835)
Options cancelled/forfeited, Shares	(1,945)	(7,095)
Options outstanding, ending balance, Shares	1,174,393	1,407,501
Options outstanding, beginning balance, Weighted Average Exercise Price	$ 51.07	$ 43.13
Options granted, Weighted Average Exercise Price	110.03	90.08
Options exercised, Weighted Average Exercise Price	31.55	31.79
Options cancelled/forfeited, Weighted Average Exercise Price	73.67	55.13
Options outstanding, ending balance, Weighted Average Exercise Price	$ 54.23	$ 45.34

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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