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Basis Of Presentation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basis Of Presentation [Abstract]
Weighted average shares outstanding (basic)	4,358	4,347	4,350	4,385
Impact of common stock equivalents	4	18	9	21
Weighted average shares outstanding (diluted)	4,362	4,365	4,359	4,406
Anti-dilutive options excluded from calculation	93	7	74	20
Net income	$ 3,462	$ 4,499	$ 8,248	$ 11,720
Basic earnings per share	$ 0.79	$ 1.04	$ 1.90	$ 2.67
Diluted earnings per share	$ 0.79	$ 1.03	$ 1.89	$ 2.66

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