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Description of Business, Basis of Preparation and Summary of Significant Accounting Policies - Carrying Amounts and Estimated Fair Market Values of Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Mar. 31, 2025
--- | --- | ---
Carrying Amount |  |
Liabilities: |  |
Long-term debt | $ 3,274,623 | $ 3,277,915
Carrying Amount | A&E Term Loan Facility |  |
Liabilities: |  |
Long-term debt | 1,157,123 | 1,160,415
Carrying Amount | 2022 Secured Notes |  |
Liabilities: |  |
Long-term debt | 828,466 | 828,466
Carrying Amount | 2022 Unsecured Notes |  |
Liabilities: |  |
Long-term debt | 639,034 | 639,034
Carrying Amount | 2024 Secured Notes |  |
Liabilities: |  |
Long-term debt | 650,000 | 650,000
Estimated Fair Value | Level 2 |  |
Liabilities: |  |
Long-term debt | 3,295,774 | 3,235,009
Estimated Fair Value | A&E Term Loan Facility | Level 2 |  |
Liabilities: |  |
Long-term debt | 1,158,569 | 1,156,063
Estimated Fair Value | 2022 Secured Notes | Level 2 |  |
Liabilities: |  |
Long-term debt | 822,253 | 799,470
Estimated Fair Value | 2022 Unsecured Notes | Level 2 |  |
Liabilities: |  |
Long-term debt | 643,827 | 627,851
Estimated Fair Value | 2024 Secured Notes | Level 2 |  |
Liabilities: |  |
Long-term debt | $ 671,125 | $ 651,625

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