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Summary Of Significant Accounting Policies (Schedule Of Diluted Earnings Per Share Computed Using Weighted Average Common And Potentially Dilutive Common Equivalent Shares Outstanding) (Details) - shares
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Accounting Policies [Abstract]      
Weighted average shares outstanding used to compute basic earnings per share 33,805,530 33,562,684 33,402,147
Incremental shares attributable to stock options and restricted stock 20,900 107,566 0
Shares used to compute diluted earnings per share 33,826,430 33,670,250 33,402,147