Condensed Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2011

Condensed Quarterly Financial Data [Abstract]

Schedule Of Quarterly Financial Data

	Three months ended
	March 31,			June 30,			September 30,			December 31,
2011
Total revenues	$	12,171		$	13,054		$	20,666		$	48,887
Net loss	$	(32,674	)	$	(51,506	)	$	(40,685	)	$	(27,165	)
Net loss per share—basic and diluted	$	(0.30	)	$	(0.45	)	$	(0.35	)	$	(0.24	)
2010
Total revenues	$	46,455		$	36,878		$	15,991		$	8,146
Net income (loss)	$	11,460		$	(8,323	)	$	(34,856	)	$	(34,546	)
Net income (loss) per share—basic and diluted	$	0.11		$	(0.08	)	$	(0.34	)	$	(0.34	)