Shareholders' Equity (Schedule Of Other Option Information) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Shareholders' Equity [Abstract]
Cash received from the exercise of stock options	$ 121,000	$ 105,000	$ 121,000
Stock-based compensation expense recognized within general and administrative expense on the consolidated statements of operations	244,000	412,000	342,000
Excess income tax benefits from exercise of stock options	$ 71,000	$ 37,000	$ 72,000