Intangible Assets and Goodwill - Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Intangible Assets and Goodwill [Line Items]
Weighted Average Useful Life (years)	15 years 3 months 18 days
Amortizable intangible assets, Gross Carrying Amount	$ 120,560	$ 400,560
Amortizable intangible assets, Accumulated Amortization and Other Charges	(20,109)	(38,959)
Amortizable intangible assets, Net Carrying Amount	100,451	361,601
In-process research & development	188,620	253,620
Intangible Assets, Gross Carrying Amount	309,180	654,180
Intangible Assets, Net Carrying Amount	289,071	615,221
In-process research & development
Intangible Assets and Goodwill [Line Items]
In-process research & development	188,620	253,620
Product licenses, net
Intangible Assets and Goodwill [Line Items]
Amortizable intangible assets, Gross Carrying Amount	0	30,000
Amortizable intangible assets, Accumulated Amortization and Other Charges	0	(3,013)
Amortizable intangible assets, Net Carrying Amount	$ 0	26,987
Developed product rights, net
Intangible Assets and Goodwill [Line Items]
Weighted Average Useful Life (years)	15 years 3 months 18 days
Amortizable intangible assets, Gross Carrying Amount	$ 120,560	370,560
Amortizable intangible assets, Accumulated Amortization and Other Charges	(20,109)	(35,946)
Amortizable intangible assets, Net Carrying Amount	$ 100,451	$ 334,614