Goodwill - Additional Information (Detail)			3 Months Ended			3 Months Ended	9 Months Ended
	Sep. 30, 2012 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2012 Lev Pharmaceuticals Inc Acquisition USD ($)	Jun. 30, 2012 Lev Pharmaceuticals Inc Acquisition USD ($)	Oct. 21, 2008 Lev Pharmaceuticals Inc Acquisition USD ($)	Jun. 30, 2012 Lev Pharmaceuticals Inc Acquisition Cinryze Minimum USD ($)	Sep. 30, 2012 Duo Cort Pharma Ab Acquisition USD ($)	Sep. 30, 2012 Duo Cort Pharma Ab Acquisition SEK	Nov. 15, 2011 Duo Cort Pharma Ab Acquisition USD ($)	May 31, 2010 Auralis Acquisition USD ($)
Goodwill [Line Items]
Contingent consideration, per share					$ 0.50
Contingent consideration, potential cash payment					$ 87,500,000
Estimated cumulative product sales by October 2018						600,000,000
Contingent consideration, cash payment			91,400,000
Contingent consideration payable in the 4th quarter	8,042,000	7,293,000	900,000
Addition to goodwill				86,400,000
Recognized goodwill on acquisition									7,300,000	5,900,000
Adjustments to goodwill resulting from recognition of deferred tax assets							$ 3,500,000	22,800,000
Ownership interest										100.00%