Acquisitions - Par West Acquisition (Details) shares in Thousands, $ in Thousands			12 Months Ended
	Jan. 11, 2019 USD ($)	Dec. 19, 2018 USD ($) refinery shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares
Schedule of Asset Acquisition [Line Items]
Issuance of common stock in connection with acquisition	$ 37,000		$ 36,980	$ 19,318
Common Stock
Schedule of Asset Acquisition [Line Items]
Issuance of common stock in connection with acquisition (in shares) | shares			2,364	1,108
Issuance of common stock in connection with acquisition			$ 23	$ 11
Par West - Asset Acquisition
Schedule of Asset Acquisition [Line Items]
Asset acquisition, consideration transferred		$ 66,900
Asset acquisition, consideration transferred, working capital adjustments		4,300
Payments for asset acquisitions		47,600
Issuance of common stock in connection with acquisition		19,300
Property, plant and equipment, additions		45,200
Asset acquisition, non-hydrocarbon inventory		4,300
Asset acquisition, hydrocarbon inventory		$ 17,400
Number of refineries | refinery		2
Asset acquisition, transaction costs				$ 5,700
Par West - Asset Acquisition | Common Stock
Schedule of Asset Acquisition [Line Items]
Issuance of common stock in connection with acquisition (in shares) | shares		1,100