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Property, Plant and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment | $ 692,282 | $ 461,325
Less: accumulated depreciation | (227,470) | (166,281)
Property, plant and equipment, net | 464,812 | 295,044
Depreciation expense | 35,731 | 26,701
Pipelines and Transportation |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment | 580,631 | 354,429
Less: accumulated depreciation | (176,020) | (125,771)
Property, plant and equipment, net | 404,611 | 228,658
Depreciation expense | 27,682 | 20,803
Wholesale Marketing and Terminalling |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment | 111,651 | 106,896
Less: accumulated depreciation | (51,450) | (40,510)
Property, plant and equipment, net | 60,201 | 66,386
Depreciation expense | 8,049 | 5,898
Land |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment | 14,533 | 4,458
Building and building improvements |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment | 2,742 | 1,853
Pipelines, tanks and terminals |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment | 606,116 | 427,287
Asset retirement obligation assets |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment | 2,073 | 2,073
Other equipment |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment | 30,803 | 16,634
Construction in process |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment | $ 36,015 | $ 9,020

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