Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Contingency [Line Items]
Net operating loss carryovers	$ 1,700,000,000
Income tax benefit	20,720,000	$ 69,689,000	$ (333,000)
Unrecognized tax benefits, period increase (decrease)	$ 0
Tax Cuts and Jobs Act of 2017, income tax benefit			$ 700,000
Washington Refinery Acquisition
Income Tax Contingency [Line Items]
Income tax benefit		$ 64,200,000