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Stock Option And Stock Award Plans (Summary of Assumptions) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Dividend yield 2.60% 2.50%
Weighted average volatility percentage 48.30% 43.80%
Weighted average risk-free interest rate 0.90% 0.80%
Weighted average exercise price at date of grant (also weighted average market price at date of grant): $ 16.37 $ 11.90
Estimated weighted average fair value of options per share at date of grant $ 5.57 $ 4.44
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period, Fair Value $ 2,165 $ 2,833
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price   $ 10.75
Officers    
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Holding period (years): 5 years 5 years
Weighted average exercise price at date of grant (also weighted average market price at date of grant): $ 16.37 $ 14.41