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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, 2021
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]      
Weighted average shares outstanding used to compute basic earnings per share 33,562,684 33,402,147 33,236,115
Incremental shares attributable to stock options and restricted stock 107,566 0 22,022
Shares used to compute diluted earnings per share 33,670,250 33,402,147 33,258,137