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Segment Data - PP&E (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Property, plant and equipment	$ 448,722	$ 448,722	$ 367,179
Less: accumulated depreciation	(134,052)	(134,052)	(112,111)
Property, plant and equipment, net	314,670	314,670	$ 255,068
Depreciation expense	6,702	19,632
Pipelines and transportation
Segment Reporting Information [Line Items]
Property, plant and equipment	356,646	356,646
Less: accumulated depreciation	(101,801)	(101,801)
Property, plant and equipment, net	254,845	254,845
Depreciation expense	5,284	15,808
Wholesale marketing and terminalling
Segment Reporting Information [Line Items]
Property, plant and equipment	92,076	92,076
Less: accumulated depreciation	(32,251)	(32,251)
Property, plant and equipment, net	59,825	59,825
Depreciation expense	$ 1,418	$ 3,824

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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