Revenue Recognition (Disaggregated Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 3,176,996	$ 2,788,957	$ 2,125,476
Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	764,401	680,965	555,997
Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	2,317,542	2,012,357	1,468,111
Sulfur Services
Disaggregation of Revenue [Line Items]
Total revenues	95,053	95,635	101,368
Offshore Pipeline Transportation
Disaggregation of Revenue [Line Items]
Total revenues	382,154	319,045	278,459
Offshore Pipeline Transportation | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	382,154	319,045	278,459
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	1,734,248	1,248,085	964,632
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	1,639,195	1,152,450	863,264
Soda and Sulfur Services | Sulfur Services
Disaggregation of Revenue [Line Items]
Total revenues	95,053	95,635	101,368
Marine Transportation
Disaggregation of Revenue [Line Items]
Total revenues	327,464	293,295	190,827
Marine Transportation | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	327,464	293,295	190,827
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	733,130	928,532	691,558
Onshore Facilities and Transportation | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	54,783	68,625	86,711
Onshore Facilities and Transportation | Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	678,347	859,907	604,847
Onshore Facilities and Transportation | Sulfur Services
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ 0	$ 0