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Income Taxes (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Taxes [Line Items]      
Unrecognized tax benefits that would impact effective tax rate $ 0 $ 0  
Statutory Federal Income Tax Rate 21.00%    
Accrued interest receivable with respect to open tax refunds $ 0 0 $ 0
Federal [Member]      
Income Taxes [Line Items]      
Operating Loss Carryforwards $ 0 $ 0