Collaboration, License, Promotion and Other Commercial Agreements - North America - Royalty Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues:
Revenue	$ 116,680	$ 103,468	$ 89,432	$ 79,943	$ 126,301	$ 131,167	$ 102,215	$ 68,730	$ 389,523	$ 428,413	$ 346,639
Collaborative arrangements revenue
Revenues:
Revenue									381,545	379,652	272,839
Collaborative arrangements revenue | North America | AbbVie
Revenues:
Revenue									370,902	327,591	266,177
Royalty | North America | AbbVie
Revenues:
Revenue									2,299	2,162	1,934
Royalty | Canada and Mexico | AbbVie
Revenues:
Revenue									$ 2,300	$ 2,200	$ 1,900