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Segment Data - PP&E (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |
Property, plant and equipment | $ 453,591 | $ 452,746
Less: accumulated depreciation | (146,712) | (140,184)
Property, plant and equipment, net | 306,879 | $ 312,562
Depreciation expense | 6,574 |
Pipelines and transportation |  |
Segment Reporting Information [Line Items] |  |
Property, plant and equipment | 359,213 |
Less: accumulated depreciation | (112,170) |
Property, plant and equipment, net | 247,043 |
Depreciation expense | 5,241 |
Wholesale marketing and terminalling |  |
Segment Reporting Information [Line Items] |  |
Property, plant and equipment | 94,378 |
Less: accumulated depreciation | (34,542) |
Property, plant and equipment, net | 59,836 |
Depreciation expense | $ 1,333 |

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