Revenue Recognition (Disaggregated Revenue) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total revenues	$ 2,966,216,000	$ 3,176,996,000	$ 2,788,957,000
Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	793,170,000	764,401,000	680,965,000
Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	2,093,682,000	2,317,542,000	2,012,357,000
Sulfur Services
Disaggregation of Revenue [Line Items]
Total revenues	79,364,000	95,053,000	95,635,000
Offshore Pipeline Transportation
Disaggregation of Revenue [Line Items]
Total revenues	404,919,000	382,154,000	319,045,000
Offshore Pipeline Transportation | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	404,919,000	382,154,000	319,045,000
Offshore Pipeline Transportation | Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0
Offshore Pipeline Transportation | Sulfur Services
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0
Soda and Sulfur Services
Disaggregation of Revenue [Line Items]
Total revenues	1,540,723,000	1,734,248,000	1,248,085,000
Soda and Sulfur Services | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0
Soda and Sulfur Services | Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	1,461,359,000	1,639,195,000	1,152,450,000
Soda and Sulfur Services | Sulfur Services
Disaggregation of Revenue [Line Items]
Total revenues	79,364,000	95,053,000	95,635,000
Marine Transportation
Disaggregation of Revenue [Line Items]
Total revenues	321,616,000	327,464,000	293,295,000
Marine Transportation | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	321,616,000	327,464,000	293,295,000
Marine Transportation | Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0
Marine Transportation | Sulfur Services
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0
Onshore Facilities and Transportation
Disaggregation of Revenue [Line Items]
Total revenues	698,958,000	733,130,000	928,532,000
Onshore Facilities and Transportation | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	66,635,000	54,783,000	68,625,000
Onshore Facilities and Transportation | Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	632,323,000	678,347,000	859,907,000
Onshore Facilities and Transportation | Sulfur Services
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ 0	$ 0