Derivatives (Schedule of Effect on Operating Results) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Commodity derivatives - futures and call options
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income	$ (2,030)	$ (9,186)
Natural Gas Swap | Soda and sulfur services operating costs
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in Income	3,010
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	(2,918)	967
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	$ 888	(10,153)
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		$ 14,085