Properties, Plants and Equipment (Components Of Property, Plants And Equipment) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Properties, plants and equipment, at cost	$ 6,523,789	$ 5,546,856
Accumulated depreciation	(1,810,515)	(1,538,408)
Properties, plants and equipment, net	4,713,274	4,008,448
Land, buildings and improvements
Property, Plant and Equipment [Line Items]
Properties, plants and equipment, at cost	442,214	326,097
Refining facilities
Property, Plant and Equipment [Line Items]
Properties, plants and equipment, at cost	3,904,161	3,382,369
Pipelines and terminals
Property, Plant and Equipment [Line Items]
Properties, plants and equipment, at cost	1,484,502	1,392,898
Transportation vehicles
Property, Plant and Equipment [Line Items]
Properties, plants and equipment, at cost	20,394	18,841
Other fixed assets
Property, Plant and Equipment [Line Items]
Properties, plants and equipment, at cost	467,469	153,463
Construction in progress
Property, Plant and Equipment [Line Items]
Properties, plants and equipment, at cost	$ 205,049	$ 273,188