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Income Taxes (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Examination [Line Items]        
Deferred Tax Assets, Valuation Allowance   $ 0 $ 0  
Anticipated Reduction Resulting from Lapse of Applicable Statue of Limitations   565,000 496,000  
Income tax interest and penalties   200,000 600,000 $ 200,000
Accrued income tax interest and penalties   $ 900,000 $ 700,000  
Forecast [Member]        
Income Tax Examination [Line Items]        
Anticipated Reduction Resulting from Lapse of Applicable Statue of Limitations $ 600,000