Acquisitions - Washington Acquisition (Details) mbpd in Thousands, bbl / d in Thousands, shares in Millions, bbl in Millions		1 Months Ended		12 Months Ended
	Jan. 11, 2019 USD ($) shares	Jan. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2021 USD ($) bbl / d	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 09, 2019 USD ($)	Nov. 26, 2018 mbpd bbl
Business Acquisition [Line Items]
Oil and gas refinery | bbl / d				154
Issuance of common stock in connection with acquisition	$ 37,000,000					$ 36,980,000
Acquisition and integration costs				$ 87,000	$ 614,000	4,704,000
Income tax benefit				$ 1,021,000	$ (20,720,000)	(69,689,000)
Term Loan | Term Loan B
Business Acquisition [Line Items]
Debt instrument, face amount	250,000,000
Term Loan | Par Pacific Term Loan
Business Acquisition [Line Items]
Debt instrument, face amount								$ 45,000,000
Washington Refinery Acquisition
Business Acquisition [Line Items]
Oil and gas refinery | mbpd									42
Oil and gas storage capacity | bbl									2.9
Consideration transferred	326,500,000
Payments to acquire businesses	$ 289,500,000
Issuance of common stock in connection with acquisition (in shares) | shares	2.4
Acquisition and integration costs		$ 5,400,000	$ 4,200,000			2,200,000	$ 2,600,000
Revenue						1,200,000,000
Earnings (loss) of acquiree since acquisition date, actual						65,800,000
Income tax benefit						$ (64,200,000)