SEGMENT INFORMATION Table 4 (Details) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Segment Information | ||
| Total consolidated assets | $ 5,149,262 | $ 4,918,796 |
| Operating Segments [Member] | ||
| Segment Information | ||
| Total consolidated assets | 4,647,353 | 4,432,036 |
| Operating Segments [Member] | Pipeline Segment | ||
| Segment Information | ||
| Total consolidated assets | 2,051,866 | 1,962,821 |
| Operating Segments [Member] | Storage Segment | ||
| Segment Information | ||
| Total consolidated assets | 2,438,621 | 2,241,573 |
| Operating Segments [Member] | Fuels Marketing Segment | ||
| Segment Information | ||
| Total consolidated assets | 156,866 | 227,642 |
| Operating Segments [Member] | Other partnership assets | ||
| Segment Information | ||
| Total consolidated assets | $ 501,909 | $ 486,760 |