Summary Of Significant Accounting Policies (Schedule Of Intangible Assets Impaired Charges) (Details) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Summary Of Significant Accounting Policies [Abstract]
Goodwill impairment				$ 66,589,000	$ 59,008,000
Indefinite-lived intangible asset impairment				5,100,000	1,090,000
Finite-lived intangible asset impairment				5,275,000
Total intangible asset impairment	$ 77,141,000	$ (177,000)		$ 76,964,000	$ 60,098,000