| Property, Plant and Equipment [Table Text Block] |
Property, plant and equipment consisted of the following: | | | | | | | | | | | | | | Estimated Useful Lives | | December 31, | | | 2019 | | 2018 | | (Years) | | (Thousands of Dollars) | Land | | - | | | $ | 144,409 |
| | $ | 138,487 |
| Land and leasehold improvements | 5 | - | 40 | | 223,220 |
| | 181,578 |
| Buildings | 15 | - | 40 | | 166,878 |
| | 146,517 |
| Pipelines, storage and terminals | 15 | - | 40 | | 5,038,468 |
| | 4,702,421 |
| Rights-of-way | 20 | - | 40 | | 350,026 |
| | 301,738 |
| Construction in progress | | - | | | 264,143 |
| | 157,064 |
| Total | | | | | 6,187,144 |
| | 5,627,805 |
| Less accumulated depreciation and amortization | | | | | (2,068,165 | ) | | (1,853,003 | ) | Property, plant and equipment, net | | | | | $ | 4,118,979 |
| | $ | 3,774,802 |
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