Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Cost	$ 1,286,896	$ 1,200,535
Accumulated Amortization	(361,665)	(199,857)
Net	925,231	1,000,678
In-process research and development	379,395	382,075
Intangible assets, cost	1,666,291	1,582,610
Intangible assets, net	1,304,626	1,382,753
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ 0	0
Product rights
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Amortization Period (in years)	9 years
Cost	$ 1,153,096	1,197,535
Accumulated Amortization	(328,587)	(198,857)
Net	$ 824,509	998,678
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Weighted- Average Amortization Period (in years)	5 years 8 months 12 days
Cost	$ 133,800	3,000
Accumulated Amortization	(33,078)	(1,000)
Net	$ 100,722	$ 2,000