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Revenue Recognition (Disaggregated Revenue) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2018
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 745,278 | $ 2,223,474
Transferred over time | Fee-based revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 168,599 | 482,290
Transferred over time | Refinery Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 23,515 | 75,190
Transferred at point in time | Product Sales |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 553,164 | 1,665,994
Onshore facilities and transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 327,145 | 972,207
Onshore facilities and transportation | Transferred over time | Fee-based revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 42,188 | 107,536
Onshore facilities and transportation | Transferred over time | Refinery Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Onshore facilities and transportation | Transferred at point in time | Product Sales |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 284,957 | 864,671
Sodium Minerals & Sulfur Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 291,722 | 876,513
Sodium Minerals & Sulfur Services | Transferred over time | Fee-based revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Sodium Minerals & Sulfur Services | Transferred over time | Refinery Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 23,515 | 75,190
Sodium Minerals & Sulfur Services | Transferred at point in time | Product Sales |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 268,207 | 801,323
Offshore Pipeline Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 70,115 | 213,344
Offshore Pipeline Transportation | Transferred over time | Fee-based revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 70,115 | 213,344
Offshore Pipeline Transportation | Transferred over time | Refinery Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Offshore Pipeline Transportation | Transferred at point in time | Product Sales |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Marine Transportation |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 56,296 | 161,410
Marine Transportation | Transferred over time | Fee-based revenues |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 56,296 | 161,410
Marine Transportation | Transferred over time | Refinery Services |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | 0 | 0
Marine Transportation | Transferred at point in time | Product Sales |  |
Disaggregation of Revenue [Line Items] |  |
Total revenues | $ 0 | $ 0

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