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Stock-Based Compensation (Summary of Stock Option Activity) (Details)
$ / shares in Units, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Stock-Based Compensation [Abstract]    
Options, beginning of year | shares 215,970  
Options, Granted | shares 1,000  
Options, Exercised | shares (8,970)  
Options, Forfeited | shares (2,250)  
Options, end of year | shares 205,750 215,970
Options, Exercisable, end of period | shares 171,000  
Weighted Average Exercise Price Per Share, Outstanding, beginning of period | $ / shares $ 25.73  
Weighted Average Exercise Price Per Share, Granted | $ / shares 26.35  
Weighted Average Exercise Price Per Share, Exercised | $ / shares 18.91  
Weighted Average Exercise Price Per Share, Forfeited | $ / shares 33.72  
Weighted Average Exercise Price Per Share, Outstanding, end of period | $ / shares 25.94 $ 25.73
Weighted Average Exercise Price Per Share, Exercisable, end of period | $ / shares $ 25.75  
Weighted Average Remaining Contractual Term, Outstanding 5 years 8 months 12 days 6 years
Weighted Average Remaining Contractual Term, Granted in Period 10 years  
Weighted Average Remaining Contractual Term, Exercised During Period 2 years 4 months 24 days  
Weighted Average Remaining Contractual Term, Forfeited During Period 7 years 8 months 12 days  
Weighted Average Remaining Contractual Term, Exercisable at End of Period 4 years 10 months 24 days  
Aggregate Intrinsic Value, Outstanding, beginning of period | $ $ 743  
Aggregate Intrinsic Value, Outstanding, end of period | $ 662 $ 743
Aggregate Intrinsic Value, Exercisable at end of period | $ $ 662