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Derivatives (Schedule of Effect on Operating Results) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2023 | Mar. 31, 2022
Level 3 | Preferred Distribution Rate Reset Election |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Preferred Distribution Rate Reset Election | $ 0 |
Commodity derivatives - futures and call options | Cost of Goods and Services Sold |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain (Loss) Recognized in Income | (9,186) | $ 4,878
Natural Gas Swap | Cost of Goods and Services Sold | Soda and sulfur services operating costs |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain (Loss) Recognized in Income | 14,085 |
Contracts designated as hedges under accounting guidance | Commodity derivatives - futures and call options | Cost of Goods and Services Sold | Onshore facilities and transportation product costs |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain (Loss) Recognized in Income | 967 | (1,170)
Contracts not considered hedges under accounting guidance | Commodity derivatives - futures and call options | Cost of Goods and Services Sold | 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 | $ (10,153) | 6,048
Contracts not considered hedges under accounting guidance | Natural Gas Swap | Cost of Goods and Services Sold | Soda and sulfur services operating costs |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Gain (Loss) Recognized in Income |  | $ (1,102)

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