Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	6 Months Ended
Sep. 30, 2024	Mar. 31, 2024
Debt Instrument [Line Items]
Total long-term debt (including current portion)	$ 1,060,000
Long-term debt, net	1,060,000	$ 1,135,000
Less: unamortized debt costs	(8,414)	(9,196)
Long-term debt, net	$ 1,051,586	1,125,804
Senior Notes \| 2021 Senior Notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate	3.75%
Total long-term debt (including current portion)	$ 600,000	600,000
Senior Notes \| 2019 Senior Notes
Debt Instrument [Line Items]
Debt instrument, stated interest rate	5.125%
Total long-term debt (including current portion)	$ 400,000	400,000
Term Loans \| 2012 Term B-5 Loans
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.00%
Term Loans \| 2012 Term B-5 Loans
Debt Instrument [Line Items]
Total long-term debt (including current portion)	$ 60,000	$ 135,000

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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