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Derivatives (Schedule of Effect on Operating Results) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Commodity derivatives - futures and call options |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of Gain (Loss) Recognized in Income | $ 440 | $ (753) | $ (1,590) | $ (9,939)
Natural Gas Swap | Soda and sulfur services operating costs |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of Gain (Loss) Recognized in Income | (1,891) |  | 1,119 |
Contracts designated as hedges under accounting guidance | Commodity derivatives - futures and call options | Onshore facilities and transportation product costs |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of Gain (Loss) Recognized in Income | (59) | 1,388 | (2,977) | 2,355
Contracts not considered hedges under accounting guidance | Commodity derivatives - futures and call options | Onshore facilities and transportation product costs, Soda and sulfur services operating costs |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of Gain (Loss) Recognized in Income | $ 499 | (2,141) | $ 1,387 | (12,294)
Contracts not considered hedges under accounting guidance | Natural Gas Swap | Soda and sulfur services operating costs |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of Gain (Loss) Recognized in Income |  | $ (7,599) |  | $ 6,486

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A + Details
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