Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Cost	$ 1,323,585	$ 1,200,535
Accumulated Amortization	(280,874)	(199,857)
Total	1,042,711	1,000,678
In-process research and development	381,115	382,075
Intangible assets, cost	1,704,700	1,582,610
Intangible assets, net	$ 1,423,826	1,382,753
Product rights
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Amortization Period (in years)	9 years 6 months
Cost	$ 1,189,785	1,197,535
Accumulated Amortization	(265,284)	(198,857)
Total	$ 924,501	998,678
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Amortization Period (in years)	6 years
Cost	$ 133,800	3,000
Accumulated Amortization	(15,590)	(1,000)
Total	$ 118,210	$ 2,000