Long-term Debt - Schedule of Long-term Debt Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022
Debt Instrument [Line Items]
Less: debt issuance costs	$ (13,658)	$ (15,173)
Long-term debt	1,590,041	1,589,490
Current portion of long-term debt	2,968	3,268
Long-term debt, less current portion	1,587,073	1,586,222
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Long-term debt	15,528	16,492
Senior Secured First Lien Notes Due 2024 [Member]
Debt Instrument [Line Items]
Long-term debt	563,171	563,171
Senior Notes Due 2024 [Member]
Debt Instrument [Line Items]
Long-term debt	525,000	525,000
Senior Notes Due 2025 [Member]
Debt Instrument [Line Items]
Long-term debt	$ 500,000	$ 500,000

Amount of short-term and long-term debt and lease obligation.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Amount of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, classified as current.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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