Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Current income taxes
Federal	$ 205,062	$ 177,652	$ 146,939
State	34,461	43,847	32,065
Foreign	53,978	61,254	41,884
Total current income taxes	293,501	282,753	220,888
Deferred income taxes
Federal	11,649	(1,134)	(3,113)
State	3,329	219	(2,336)
Foreign	(6,194)	(4,630)	3,939
Total deferred income taxes	8,784	(5,545)	(1,510)
Income Tax Expense (Benefit), Total	$ 302,285	$ 277,208	$ 219,378