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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Income taxes      
Income tax expense $ 36 $ 86  
Accumulated other comprehensive earnings, net of tax 21,713   $ 24,786
Accumulated other comprehensive earnings, tax $ 11,300    
Federal      
Income taxes      
Net operating loss carryforwards     566,600
State      
Income taxes      
Net operating loss carryforwards     $ 385,200