Intangible Assets (Schedule Of Balance Of The Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	$ 768,430	$ 765,585
Accumulated Amortization	125,853	116,926
Net Intangible Assets	642,577	648,659
Cinryze Product Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	521,000	521,000
Accumulated Amortization	71,764	66,554
Net Intangible Assets	449,236	454,446
Vancocin Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	168,099	168,099
Accumulated Amortization	49,749	48,074
Net Intangible Assets	118,350	120,025
Buccolam Product Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	6,465	6,271
Accumulated Amortization	377	209
Net Intangible Assets	6,088	6,062
Auralis Contract Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	9,215	8,938
Accumulated Amortization	1,844	1,579
Net Intangible Assets	7,371	7,359
Plenadren Product Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Intangible Assets	63,651	61,277
Accumulated Amortization	2,119	510
Net Intangible Assets	$ 61,532	$ 60,767