SEGMENT INFORMATION Table 4 - Assets by Reportable Segment (Details) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Segment Information | ||
| Total consolidated assets | $ 6,535,233 | $ 5,030,545 |
| Operating Segments [Member] | ||
| Segment Information | ||
| Total consolidated assets | 6,346,726 | 4,715,566 |
| Operating Segments [Member] | Pipeline Segment | ||
| Segment Information | ||
| Total consolidated assets | 3,492,417 | 2,024,633 |
| Operating Segments [Member] | Storage Segment | ||
| Segment Information | ||
| Total consolidated assets | 2,735,563 | 2,522,586 |
| Operating Segments [Member] | Fuels Marketing Segment | ||
| Segment Information | ||
| Total consolidated assets | 118,746 | 168,347 |
| Operating Segments [Member] | Other partnership assets | ||
| Segment Information | ||
| Total consolidated assets | $ 188,507 | $ 314,979 |