Income Taxes - Schedule of Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Domestic	$ 1,084,446	$ 1,033,428	$ 688,981
Foreign	241,910	209,871	289,960
Income before income taxes	1,326,356	1,243,299	978,941
Intercompany dividends	$ 0	$ 0	$ 250,000