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Income Taxes Income before taxes, by location (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Operating Loss Carryforwards [Line Items]      
Income (Loss) from Continuing Operations before Income Taxes, Domestic $ (25,249) $ (39,518) $ 28,756
Income (Loss) from Continuing Operations before Income Taxes, Foreign $ 0 $ 0 0
Federal income tax rate 21.00% 35.00%  
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest $ (25,249) $ (39,518) $ 28,756