Business Acquisition (Schedule Of Unaudited Pro Forma Results) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Business Acquisition [Abstract]
Operating revenues	$ 29,997	$ 30,374
Net Income (loss)	$ (3,697)	$ 1,960
Basic earnings (loss) per share	$ (0.65)	$ 0.35
Dilluted earnings (loss) per share	$ (0.65)	$ 0.35