Segment Data - Narrative (Details)	3 Months Ended
	Mar. 31, 2020 bbl / pure facility store
Segment Reporting Information [Line Items]
Number of stores | store	253
Refining
Segment Reporting Information [Line Items]
Refinery throughput capacity (in bpd)	302,000
Number Of Biodiesel Facilities | facility	3
Big Spring refinery | Refining
Segment Reporting Information [Line Items]
Refinery throughput capacity (in bpd)	73,000
El Dorado Refinery | Refining
Segment Reporting Information [Line Items]
Refinery throughput capacity (in bpd)	80,000
Tyler Refinery | Refining
Segment Reporting Information [Line Items]
Refinery throughput capacity (in bpd)	75,000
Krotz Spring Refinery | Refining
Segment Reporting Information [Line Items]
Refinery throughput capacity (in bpd)	74,000