Income Taxes - Summary of Activity Related to Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Balance, beginning of fiscal year	$ 185,595	$ 129,738	$ 112,806
Increase related to prior year tax positions	1,571	2,728	2,549
Decrease related to prior year tax positions	(253)	(190)	(632)
Increase related to current year tax positions	14,017	15,608	16,123
Increase related to business combinations		54,193	0
Expiration of the statute of limitations for the assessment of taxes	(12,744)	(16,482)	(1,108)
Balance, end of fiscal year	$ 188,186	$ 185,595	$ 129,738

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Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 217
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-217

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
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-Topic 740
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of increase in unrecognized tax benefits resulting from acquisitions.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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