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Derivatives (Effects on Consolidated Statements of Operations and Other Comprehensive Income (Loss)) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Unrealized losses on valuation of embedded derivatives |  | $ 18,584,000 |
Embedded Derivative Financial Instruments |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Unrealized losses on valuation of embedded derivatives |  |  | $ 30,838,000
Level 3 | Embedded Derivative Financial Instruments |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net loss for the period including earnings | $ 0 | (18,584,000) | (30,838,000)
Commodity Derivatives |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Unrealized losses on valuation of embedded derivatives | 20,755,000 | (7,416,000) | 16,525,000
Swap | Soda and sulfur services operating costs |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Unrealized losses on valuation of embedded derivatives | (6,953,000) | (31,904,000) | (1,174,000)
Embedded Derivative Financial Instruments |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Unrealized losses on valuation of embedded derivatives |  |  | 30,800,000
Designated as Hedging Instrument | Commodity Derivatives | Onshore facilities and transportation product costs |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Unrealized losses on valuation of embedded derivatives | (617,000) | (1,403,000) | 7,634,000
Not Designated As Hedging Instrument | Commodity Derivatives | Onshore facilities and transportation product costs, soda and sulfur services operating costs |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Unrealized losses on valuation of embedded derivatives | $ 21,372,000 | $ (6,013,000) | $ 8,891,000

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