Summary Of Significant Accounting Policies (Goodwill) (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2013	Dec. 31, 2014
Summary Of Significant Accounting Policies [Abstract]
Percentage of the discounted cash flow method for estimation of fair value of reporting units	80.00%
Percentage of the public company guideline method for estimation of fair value of reporting units	20.00%
Goodwill, Impaired, Accumulated Impairment Loss	$ 1,417,700		$ 91,000
Reduction in value of goodwill	$ 1,326,701	$ 91,016