Collaboration, License, Co-Promotion and Other Commercial Agreements - European and Other Territories (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Oct. 31, 2015	Sep. 30, 2012
Collaboration, License and Co-Promotion Agreements
Revenue	$ 89,432	$ 102,215	$ 169,375	$ 170,945
Collaborative arrangements revenue
Collaboration, License and Co-Promotion Agreements
Revenue	89,423	77,322	$ 163,868	143,474
License | AbbVie
Collaboration, License and Co-Promotion Agreements
Royalty percentage, five years following the first commercial sale			upper-single digits
Annual royalty			5 years
Royalty percentage, thereafter			low-double digits
Royalty percentage, expanded territory			lower-single digits
License | AbbVie | Europe
Collaboration, License and Co-Promotion Agreements
Remaining milestone payment due upon the amendment to the license agreement					$ 42,500
Revenue remaining performance obligation						$ 0
Royalty | AbbVie | Europe
Collaboration, License and Co-Promotion Agreements
Revenue	$ 400	$ 300	$ 1,100	$ 700