Net Income (Loss) Per Common Share (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Basic and diluted net loss per common share:
Net income (loss)	$ 4,271	$ (11,709)	$ (9,674)	$ (33,854)
Basic and diluted weighted average number of common shares outstanding		96,133	113,671	87,414
Basic and diluted net loss per common share		$ (0.12)	$ (0.09)	$ (0.39)