Segment Data Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($) bbl / pure	Mar. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Refinery Throughput Capacity (bpd)	155,000
Intercompany fees and sales	$ 0.0	$ 82.0	[1]
Tyler Refinery [Member]
Segment Reporting Information [Line Items]
Refinery Throughput Capacity (bpd)	75,000
El Dorado Refinery [Member]
Segment Reporting Information [Line Items]
Refinery Throughput Capacity (bpd)	80,000
Refining Marketing Services [Member] | Logistics [Member]
Segment Reporting Information [Line Items]
Intercompany fees and sales	$ 4.3	3.9
Crude Transportation and Storage Fees [Member] | Logistics [Member]
Segment Reporting Information [Line Items]
Intercompany fees and sales	31.2	31.0
RIN Sales [Member] | Refining [Member]
Segment Reporting Information [Line Items]
Intercompany fees and sales	1.1	1.5
Operating Segments [Member] | Refining [Member]
Segment Reporting Information [Line Items]
Intercompany fees and sales	9.0	91.4	[1]
Operating Segments [Member] | Logistics [Member]
Segment Reporting Information [Line Items]
Intercompany fees and sales	$ 36.6	$ 36.4	[1]

[1] Intercompany fees and sales for the refining segment include revenues from the Retail Entities of $82.0 million during the three months ended March 31, 2016, the operations of which are reported in discontinued operations.