Net Loss Per Share (Computation Of Basic And Diluted Net Loss Per Share) (Details) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net Loss Per Share
Net loss	$ (88,429)	$ (40,859)	$ (300,084)	$ (145,599)
Denominator for basic and diluted earnings per share- weighted-average shares	196,462,631	188,420,580	191,965,763	187,418,995
Basic and diluted net loss per share	$ (0.45)	$ (0.22)	$ (1.56)	$ (0.78)