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Derivatives (Narrative) (Details) - USD ($) |  |  | 3 Months Ended | 6 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 26, 2023 | Jan. 25, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Sep. 30, 2023 | May 09, 2024 | Dec. 31, 2023
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Net broker receivable |  |  | $ 13,000,000.0 |  | $ 13,000,000.0 |  |  |  | $ 10,900,000
Initial margin |  |  | 4,300,000 |  | 4,300,000 |  |  |  | 5,700,000
Variation margin |  |  |  |  | 8,700,000 |  | $ 5,200,000 |  |
Proceeds from issuance of debt |  | $ 491,000,000 |  |  |  |  |  |  |
Restricted cash |  |  | 18,804,000 |  | 18,804,000 |  |  |  | 18,804,000
Loss on extinguishment of debt |  |  | (1,429,000) | $ (3,000) | 1,429,000 | $ 1,812,000 |  |  |
SENIOR UNSECURED NOTES, net of debt issuance costs, discount and premium |  |  | $ 3,500,000,000 |  | $ 3,500,000,000 |  |  |  | $ 3,100,000,000
Senior Notes | 5.625% senior unsecured notes due 2024 |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Repayments of long term debt | $ 24,800,000 | $ 316,300,000 |  |  |  |  |  |  |
Interest rate |  | 5.625% |  |  |  |  |  |  |
Loss on extinguishment of debt |  | $ 1,800,000 |  |  |  |  |  |  |
Senior Notes | 2032 Notes |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  | 7.875% |  | 7.875% |  |  | 7.875% |
Face amount |  |  |  |  |  |  |  | $ 700,000,000 |
Senior Notes | 2030 Notes |  |  |  |  |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  | 8.875% | 8.875% |  | 8.875% |  |  |  |
Face amount |  | $ 500,000,000 |  |  |  |  |  |  |

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