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Revenue Recognition (Disaggregated Revenue) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disaggregation of Revenue [Line Items]                      
Total revenues $ 604,329 $ 621,697 $ 634,785 $ 620,009 $ 689,296 $ 745,278 $ 752,388 $ 725,808 $ 2,480,820 $ 2,912,770 $ 2,028,377
Fee-based revenues                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 714,192 660,747  
Product Sales                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 1,684,308 2,149,223  
Refinery Services                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 82,320 102,800  
Onshore facilities and transportation                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 821,072 1,233,855 1,042,229
Onshore facilities and transportation | Fee-based revenues                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 160,431 156,266  
Onshore facilities and transportation | Product Sales                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 660,641 1,077,589  
Onshore facilities and transportation | Refinery Services                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 0 0  
Sodium minerals and sulfur services                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 1,105,987 1,174,434 462,622
Sodium minerals and sulfur services | Fee-based revenues                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 0 0  
Sodium minerals and sulfur services | Product Sales                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 1,023,667 1,071,634  
Sodium minerals and sulfur services | Refinery Services                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 82,320 102,800  
Offshore pipeline transportation services                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 318,116 284,544 318,239
Offshore pipeline transportation services | Fee-based revenues                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 318,116 284,544  
Offshore pipeline transportation services | Product Sales                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 0 0  
Offshore pipeline transportation services | Refinery Services                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 0 0  
Marine transportation                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 235,645 219,937 $ 205,287
Marine transportation | Fee-based revenues                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 235,645 219,937  
Marine transportation | Product Sales                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 0 0  
Marine transportation | Refinery Services                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 $ 0 $ 0