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Income Taxes Components of Income Taxes (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
Corporate income taxes payable $ 29 $ 906  
Unrecognized tax benefits 958 8,590 $ 8,250
Interest accrued 215 922  
Penalties 287 402  
Income taxes payable $ 1,489 $ 10,820