Acquisitions (Pro Forma Financial Information Of Combined Results Of Operations) (Details) (Enobia Pharma Corp. [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Enobia Pharma Corp. [Member]
Business Acquisition [Line Items]
Revenues	$ 204,047	$ 813,588	$ 555,872
Net income	$ 50,567	$ 155,437	$ 91,592
Earnings per common share, Basic	$ 0.28	$ 0.82	$ 0.50
Earnings per common share, Diluted	$ 0.26	$ 0.79	$ 0.48