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Summary of Significant Accounting Policies (Computation of Basic and Diluted Common Shares) (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Summary Of Significant Accounting Policies [Line Items]        
Weighted average number of shares outstanding for basic per share calculation 15,872 15,748 15,846 15,727
Effect of dilutive potential shares:        
Adjusted weighted average shares outstanding for diluted per share 16,184 16,030 16,146 16,060
Stock Options [Member]        
Effect of dilutive potential shares:        
Effect of dilutive potential shares 255 267 244 288
Anti-dilutive shares:        
Anti-dilutive shares 111 73 111 73
Restricted Stock Awards [Member]        
Effect of dilutive potential shares:        
Effect of dilutive potential shares 57 15 56 45
Anti-dilutive shares:        
Anti-dilutive shares 36 125 3 73