Summary Of Significant Accounting Policies (Schedule Of Supplemental Disclosures Of Cash Flow Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash paid during the year for:
Interest	$ 1	$ 34	$ 3
Income taxes	$ 145	$ 3,450	$ 5,693