Summary Of Significant Accounting Policies (Schedule Of Basic And Diluted Net Loss Per Common Share) (Details) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Summary Of Significant Accounting Policies [Line Items]
Shares excluded from calculating basic and diluted net loss per common share excluded	9,747	17,036	12,084	16,894
Stock Options And Awards [Member]
Summary Of Significant Accounting Policies [Line Items]
Shares excluded from calculating basic and diluted net loss per common share excluded	331	1,798	429	1,656
Convertible Senior Notes [Member]
Summary Of Significant Accounting Policies [Line Items]
Shares excluded from calculating basic and diluted net loss per common share excluded	9,416	15,238	11,655	15,238