Business Combination and Asset Acquisitions Intangible Assets Acquired (Details) (Gentium [Member], USD $) In Thousands, unless otherwise specified	0 Months Ended
	Jan. 23, 2014
Acquired Intangible Assets [Line Items]
Total intangible assets	$ 960,350
Manufacturing Contracts [Member]
Acquired Intangible Assets [Line Items]
Total finite-lived intangible assets	14,500
Trade Names [Member]
Acquired Intangible Assets [Line Items]
Total finite-lived intangible assets	350
Acquired Intangible Assets Excluding In-process Research and Development [Member]
Acquired Intangible Assets [Line Items]
Total finite-lived intangible assets	734,350
In Process Research and Development [Member]
Acquired Intangible Assets [Line Items]
Total indefinite-lived intangible assets	226,000
Defibrotide VOD TX (Non-US) [Member] | Acquired developed technologies [Member]
Acquired Intangible Assets [Line Items]
Total finite-lived intangible assets	719,500
Defibrotide VOD Prophalaxis [Member] | In Process Research and Development [Member]
Acquired Intangible Assets [Line Items]
Total indefinite-lived intangible assets	168,000
Defibrotide VOD Tx (US) [Member] | In Process Research and Development [Member]
Acquired Intangible Assets [Line Items]
Total indefinite-lived intangible assets	$ 58,000