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Revenue Recognition (Disaggregated Revenue) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 398,311 | $ 434,447
Fee-based revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 203,036 | 198,851
Product Sales |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 174,263 | 212,709
Refinery Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 21,012 | 22,887
Offshore pipeline transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 108,887 | 101,990
Offshore pipeline transportation | Fee-based revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 108,887 | 101,990
Offshore pipeline transportation | Product Sales |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Offshore pipeline transportation | Refinery Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Marine transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 80,644 | 83,574
Marine transportation | Fee-based revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 80,644 | 83,574
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
Onshore transportation and services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 208,780 | 248,883
Onshore transportation and services | Fee-based revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 13,505 | 13,287
Onshore transportation and services | Product Sales |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 174,263 | 212,709
Onshore transportation and services | Refinery Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 21,012 | $ 22,887

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