Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 4,065,229	$ 3,759,973
Accumulated depreciation	(607,903)	(444,842)
Property, plant and equipment, net	3,457,326	3,315,131
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	308,166	273,168
Pipelines and related facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,023,502	926,799
Storage and terminal facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,247,115	1,111,001
Natural gas gathering and processing facilities [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,055,305	940,130
Linefill [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	27,972	25,747
Trucking equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	45,567	45,162
Office and other property and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	69,498	63,052
Construction-in-progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 288,104	$ 374,914