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Treasury Stock - Summary of Share Repurchases and Cumulatively Since Inception of Authorization (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Equity [Abstract]
Shares repurchased	377,154	645,939	1,794,723
Cost	$ 37,605,000	$ 45,710,000	$ 93,675,000
Average price	$ 99.71	$ 70.76	$ 52.19
Shares repurchased, Cumulative	114,476,691	114,099,537
Cost, Cumulative	$ 831,510,000
Average price, Cumulative	$ 7.26

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Treasury stock average cost per share.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Number of previously issued common shares repurchased by the issuing entity and held in treasury.

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Number of shares that have been repurchased during the period and are being held in treasury.

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The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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