Basis Of Presentation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Basis Of Presentation [Abstract]
Weighted average shares outstanding (basic)	4,347	4,391	4,385	4,375
Impact of common stock equivalents	18	21	21	24
Weighted average shares outstanding (diluted)	4,365	4,412	4,406	4,399
Anti-dilutive options excluded from calculation	7		20
Net income	$ 4,499	$ 4,000	$ 11,720	$ 2,321
Basic earnings per share	$ 1.04	$ 0.91	$ 2.67	$ 0.53
Diluted earnings per share	$ 1.03	$ 0.91	$ 2.66	$ 0.53