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Basis Of Presentation (Schedule Of Earnings Per Share, Basic And Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Basis Of Presentation [Abstract]
Weighted average shares outstanding (basic)	4,441	4,358	4,421	4,350
Impact of common stock equivalents	26	4	19	9
Weighted average shares outstanding (diluted)	4,467	4,362	4,440	4,359
Anti-dilutive options excluded from calculation	30	93	31	74
Net income	$ 5,862	$ 3,462	$ 15,963	$ 8,248
Basic earnings per share	$ 1.32	$ 0.79	$ 3.61	$ 1.90
Diluted earnings per share	$ 1.31	$ 0.79	$ 3.60	$ 1.89

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