Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets Disclosures
Gross Intangible Assets	$ 610,215		$ 770,161
Accumulated Amortization	120,631		152,622
Net Intangible Assets	489,584		617,539
Vancocin
Finite-Lived Intangible Assets Disclosures
Gross Intangible Assets	7,407		168,099
Accumulated Amortization	988		54,773
Net Intangible Assets	6,419	7,400	113,326
Product Rights | Cinryze
Finite-Lived Intangible Assets Disclosures
Gross Intangible Assets	521,000		521,000
Accumulated Amortization	103,024		87,394
Net Intangible Assets	417,976		433,606
Product Rights | Plenadren
Finite-Lived Intangible Assets Disclosures
Gross Intangible Assets	65,899		65,136
Accumulated Amortization	12,066		7,048
Net Intangible Assets	53,833		58,088
Product Rights | Buccolam
Finite-Lived Intangible Assets Disclosures
Gross Intangible Assets	6,559		6,566
Accumulated Amortization	1,367		876
Net Intangible Assets	5,192		5,690
Contract Rights | Auralis Limited
Finite-Lived Intangible Assets Disclosures
Gross Intangible Assets	9,350		9,360
Accumulated Amortization	3,186		2,531
Net Intangible Assets	$ 6,164		$ 6,829