Overview (Details) barrel / d in Thousands	3 Months Ended
	Mar. 31, 2020 barrel / d segment gasoline_store_facility	Jan. 01, 2020 refinery
Schedule of Equity Method Investments [Line Items]
Operating segments | segment	3
Number of owned and operated refineries | refinery		4
Oil and gas refinery capacity (in Mbpd) | barrel / d	200
Number of retail gasoline, fueling stations, rebranded	40
Number of retail gasoline, convenience stores, rebranded	31
Number of retail gasoline, convenience store facilities	34
Laramie Energy Company
Schedule of Equity Method Investments [Line Items]
Ownership interest in Laramie Energy, LLC	46.00%