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Debt (Schedule of Obligations Under Debt Arrangements) (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Jan. 25, 2023 | May 17, 2022
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Principal | $ 3,905,139 | $ 3,823,215 |  |
Unamortized Premium, Discount and Debt Issuance Costs | 56,537 | 58,751 |  |
Net Value | 3,848,602 | 3,764,464 |  |
5.875% Alkali senior secured notes due 2042(2) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal | 400,000 |  |  |
Credit Facility | Revolving Credit Facility | Revolving Loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal | 383,200 | 298,300 |  |
Unamortized Premium, Discount and Debt Issuance Costs | 0 | 0 |  |
Net Value | 383,200 | 298,300 |  |
Unamortized debt issuance costs | 5,000 | 5,700 |  |
Senior Notes | 6.250% senior unsecured notes due 2026 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal | 339,310 | 339,310 |  |
Unamortized Premium, Discount and Debt Issuance Costs | 1,562 | 1,746 |  |
Net Value | $ 337,748 | 337,564 |  |
Interest rate | 6.25% |  |  |
Senior Notes | 8.000% senior unsecured notes due 2027 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal | $ 981,245 | 981,245 |  |
Unamortized Premium, Discount and Debt Issuance Costs | 3,215 | 3,549 |  |
Net Value | $ 978,030 | 977,696 |  |
Interest rate | 8.00% |  |  |
Senior Notes | 7.750% senior unsecured notes due 2028 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal | $ 679,360 | 679,360 |  |
Unamortized Premium, Discount and Debt Issuance Costs | 5,747 | 6,121 |  |
Net Value | $ 673,613 | 673,239 |  |
Interest rate | 7.75% |  |  |
Senior Notes | 5.875% Alkali senior secured notes due 2042(2) |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal | $ 422,024 | 425,000 |  | $ 425,000
Unamortized Premium, Discount and Debt Issuance Costs | 21,593 | 21,791 |  |
Net Value | $ 400,431 | 403,209 |  |
Interest rate | 5.875% |  |  | 5.875%
Debt Instrument, Interest Rate, Limited Term Percentage |  |  |  | 0.10
Senior Notes | 8.250% Senior Unsecured Notes Due 2029 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal | $ 600,000 | 600,000 |  |
Unamortized Premium, Discount and Debt Issuance Costs | 16,410 | 17,202 |  |
Net Value | $ 583,590 | 582,798 |  |
Interest rate | 8.25% |  |  |
2030 Notes | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Principal | $ 500,000 | 500,000 |  |
Unamortized Premium, Discount and Debt Issuance Costs | 8,010 | 8,342 |  |
Net Value | $ 491,990 | $ 491,658 |  |
Interest rate | 8.875% |  | 8.875% |

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