Intangible Assets, Goodwill and Other Assets (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Amortization of expense of intangible assets	$ 11,600	$ 10,300	$ 10,300
Goodwill	301,959	301,959
Impairment of goodwill	0	0	$ 0
Soda and sulfur services
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 301,900	$ 301,900