Revenue Recognition (Disaggregated Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 2,125,476	$ 1,824,655	$ 2,480,820
Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	555,997	553,496	714,192
Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	1,468,111	1,182,697	1,684,308
Refinery Services
Disaggregation of Revenue [Line Items]
Total revenues	101,368	88,462	82,320
Offshore Pipeline Transportation
Disaggregation of Revenue [Line Items]
Total revenues	278,459	237,146	318,116
Offshore Pipeline Transportation | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	278,459	237,146	318,116
Offshore Pipeline Transportation | Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0
Offshore Pipeline Transportation | Refinery Services
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0
Sodium Minerals & Sulfur Services
Disaggregation of Revenue [Line Items]
Total revenues	964,632	877,769	1,105,987
Sodium Minerals & Sulfur Services | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0
Sodium Minerals & Sulfur Services | Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	863,264	789,307	1,023,667
Sodium Minerals & Sulfur Services | Refinery Services
Disaggregation of Revenue [Line Items]
Total revenues	101,368	88,462	82,320
Marine transportation
Disaggregation of Revenue [Line Items]
Total revenues	190,827	210,258	235,645
Marine transportation | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	190,827	210,258	235,645
Marine transportation | Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0
Marine transportation | Refinery Services
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0
Onshore Facilities & Transportation
Disaggregation of Revenue [Line Items]
Total revenues	691,558	499,482	821,072
Onshore Facilities & Transportation | Fee-based revenues
Disaggregation of Revenue [Line Items]
Total revenues	86,711	106,092	160,431
Onshore Facilities & Transportation | Product Sales
Disaggregation of Revenue [Line Items]
Total revenues	604,847	393,390	660,641
Onshore Facilities & Transportation | Refinery Services
Disaggregation of Revenue [Line Items]
Total revenues	$ 0	$ 0	$ 0