Stock-based Compensation - Schedule of Stock Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	$ 44,835	$ 37,943	$ 37,288
Income tax benefit	(10,741)	(9,304)	(9,097)
Total stock-based compensation, net of tax	34,094	28,639	28,191
RSUs, LTIP PSUs And Grants To Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	44,043	37,292	36,783
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	23,876	19,758	15,935
LTIP PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	18,463	15,676	18,941
Grants to Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	1,704	1,858	1,907
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	$ 792	$ 651	$ 505