Stock-Based Compensation - Stock Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	$ 26,816	$ 22,701	$ 14,477
Income tax benefit	(6,496)	(5,441)	(3,308)
Total stock-based compensation, net of tax	20,320	17,260	11,169
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	12,093	7,820	6,509
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	0	1,900	2,851
LTIP PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	12,865	11,555	2,203
LTIP NQSOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	0	0	1,641
Grants to Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	1,507	1,195	1,045
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation, pre-tax	$ 351	$ 231	$ 228
Number of shares authorized (in shares)	1,000,000
Award purchase period (in months)	6 months
Discount from market price	15.00%

Share-based Compensation Arrangement By Share-based Payment Award Award Purchase Period

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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