SEGMENT INFORMATION Table 4 - Assets by Reportable Segment (Details) - USD ($) $ in Thousands |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Segment Information | ||
| Total consolidated assets | $ 6,185,992 | $ 6,349,140 |
| Operating Segments [Member] | ||
| Segment Information | ||
| Total consolidated assets | 5,998,715 | 5,577,242 |
| Operating Segments [Member] | Pipeline Segment | ||
| Segment Information | ||
| Total consolidated assets | 3,884,819 | 3,637,226 |
| Operating Segments [Member] | Storage Segment | ||
| Segment Information | ||
| Total consolidated assets | 2,082,832 | 1,902,764 |
| Operating Segments [Member] | Fuels Marketing Segment | ||
| Segment Information | ||
| Total consolidated assets | 31,064 | 37,252 |
| Operating Segments [Member] | Other partnership assets | ||
| Segment Information | ||
| Total consolidated assets | 187,277 | 172,551 |
| Segment Reconciling Items [Member] | ||
| Segment Information | ||
| Total consolidated assets | $ 0 | $ 599,347 |