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Income Taxes Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]    
Unrecognized Tax Benefits $ 0  
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 0 $ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense $ 0 $ 0