| Schedule of Segment Reporting Information, by Segment [Table Text Block] |
Results of operations for the reportable segments were as follows: | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | | 2012 | | 2011 | | 2012 | | 2011 | | (Thousands of Dollars) | Revenues: | | | | | | | | Storage: | | | | | | | | Third parties | $ | 128,538 |
| | $ | 128,561 |
| | $ | 389,412 |
| | $ | 381,460 |
| Intersegment | 19,679 |
| | 13,042 |
| | 55,542 |
| | 35,925 |
| Related party | 713 |
| | 286 |
| | 2,198 |
| | 823 |
| Total storage | 148,930 |
| | 141,889 |
| | 447,152 |
| | 418,208 |
| Transportation: | | | | | | | | Third parties | 92,570 |
| | 81,834 |
| | 244,938 |
| | 226,406 |
| Intersegment | 1,160 |
| | 65 |
| | 2,171 |
| | 65 |
| Total transportation | 93,730 |
| | 81,899 |
| | 247,109 |
| | 226,471 |
| Asphalt and fuels marketing: | | | | | | | | Third parties | 1,522,945 |
| | 1,613,669 |
| | 4,745,815 |
| | 4,039,461 |
| Intersegment | 99 |
| | 5,024 |
| | 406 |
| | 9,618 |
| Total asphalt and fuels marketing | 1,523,044 |
| | 1,618,693 |
| | 4,746,221 |
| | 4,049,079 |
| Consolidation and intersegment eliminations | (20,938 | ) | | (18,131 | ) | | (58,119 | ) | | (45,608 | ) | Total revenues | $ | 1,744,766 |
| | $ | 1,824,350 |
| | $ | 5,382,363 |
| | $ | 4,648,150 |
| | | | | | | | | Operating income: | | | | | | | | Storage | $ | 50,422 |
| | $ | 48,778 |
| | $ | 160,696 |
| | $ | 140,322 |
| Transportation | 42,597 |
| | 38,248 |
| | 111,418 |
| | 102,808 |
| Asphalt and fuels marketing | (15,682 | ) | | 25,418 |
| | (323,996 | ) | | 97,689 |
| Consolidation and intersegment eliminations | (22 | ) | | 29 |
| | (48 | ) | | (16 | ) | Total segment operating (loss) income | 77,315 |
| | 112,473 |
| | (51,930 | ) | | 340,803 |
| General and administrative expenses | (24,954 | ) | | (17,731 | ) | | (75,276 | ) | | (69,833 | ) | Other depreciation and amortization expense | (1,639 | ) | | (1,765 | ) | | (5,492 | ) | | (4,911 | ) | Other asset impairment loss | — |
| | — |
| | (3,295 | ) | | — |
| Gain on legal settlement | — |
| | — |
| | 28,738 |
| | — |
| Total operating (loss) income | $ | 50,722 |
| | $ | 92,977 |
| | $ | (107,255 | ) | | $ | 266,059 |
|
|
| Reconciliation of Assets from Segment to Consolidated [Table Text Block] |
Total assets by reportable segment were as follows: | | | | | | | | | | September 30,
2012 | | December 31,
2011 | | (Thousands of Dollars) | Storage | $ | 2,609,293 |
| | $ | 2,597,904 |
| Transportation | 1,355,492 |
| | 1,251,474 |
| Asphalt and fuels marketing | 996,154 |
| | 1,717,960 |
| Total segment assets | 4,960,939 |
| | 5,567,338 |
| Other partnership assets | 402,945 |
| | 313,852 |
| Total consolidated assets | $ | 5,363,884 |
| | $ | 5,881,190 |
|
|