Summary Of Significant Accounting Policies (Schedule Of Intangible Assets Impaired Charges) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary Of Significant Accounting Policies [Abstract]
Goodwill impairment	$ 4,328,000		$ 66,589,000
Indefinite-lived intangible asset impairment	300,000		5,100,000
Finite-lived intangible asset impairment			5,275,000
Total intangible asset impairment	$ 4,628,000		$ 76,964,000