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Summary Of Significant Accounting Policies (Schedule Of Earnings Per Share Basic And Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Summary Of Significant Accounting Policies [Abstract]
Weighted average shares outstanding (basic)	4,357	4,375
Impact of common stock equivalents	9	21
Weighted average shares outstanding (diluted)	4,366	4,396
Anti-dilutive options excluded from calculation	71	10
Net income	$ 12,800	$ 16,115
Basic earnings per share	$ 2.94	$ 3.68
Diluted earnings per share	$ 2.93	$ 3.67

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