| Property, Plant and Equipment [Table Text Block] |
Property, plant and equipment, at cost, consisted of the following: | | | | | | | | | | | | | | Estimated Useful Lives | | December 31, | | | 2015 | | 2014 | | (Years) | | (Thousands of Dollars) | Land | | - | | | $ | 140,292 |
| | $ | 120,351 |
| Land and leasehold improvements | 5 | - | 40 | | 186,848 |
| | 160,283 |
| Buildings | 15 | - | 40 | | 137,269 |
| | 134,857 |
| Pipelines, storage and terminals | 20 | - | 40 | | 4,399,378 |
| | 3,963,134 |
| Rights-of-way | 20 | - | 40 | | 194,055 |
| | 160,008 |
| Construction in progress | | - | | | 151,318 |
| | 276,763 |
| Total | | | | | 5,209,160 |
| | 4,815,396 |
| Less accumulated depreciation and amortization | | | | | (1,525,589 | ) | | (1,354,664 | ) | Property, plant and equipment, net | | | | | $ | 3,683,571 |
| | $ | 3,460,732 |
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