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Income Taxes - Narrative (Details)
12 Months Ended
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
Dec. 31, 2015
Tax Cuts and Jobs Act (TCJA)        
Increase in valuation allowance $ 27,800,000      
U.S. federal corporate tax rate (as a percent) 21.00% 34.00% 34.00%  
Resulting provision from revaluation of deferred tax assets and deferred tax liabilities as of TCJA enactment date $ 97,500,000      
Income Tax Uncertainties        
Ownership change occurred, based off study       0
Uncertain tax positions reported $ 0 $ 0    
Maximum        
Tax Cuts and Jobs Act (TCJA)        
U.S. federal corporate tax rate (as a percent)   35.00%