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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]    
Income tax expense (benefit) $ (646) $ 0
Minimum    
Operating Loss Carryforwards [Line Items]    
Number of tax years open for state tax audit (in years) 3 years  
Maximum    
Operating Loss Carryforwards [Line Items]    
Number of tax years open for state tax audit (in years) 5 years  
Domestic Tax Authority    
Operating Loss Carryforwards [Line Items]    
Federal net operating loss carryovers $ 1,400,000  
Operating loss carryforwards, subject to expiration 800,000  
Operating loss carryforwards, not subject to expiration 600,000  
Tax credits, not subject to expiration $ 33,500