Collaboration, License, Co-Promotion and Other Commercial Agreements - North America - Collaborative Arrangements Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues:
Revenue	$ 81,106	$ 65,077	$ 150,261	$ 117,243
Collaborative arrangements
Revenues:
Revenue	71,207	58,640	134,293	110,504
Allergan | Collaborative arrangement, collaboration and license agreements | North America | Collaborative arrangements
Revenues:
Revenue	69,810	56,742	131,408	106,693
Allergan | Collaborative arrangement, collaboration and license agreements | North America | Collaborative arrangements, LINZESS
Revenues:
Revenue	69,264	56,307	130,413	105,759
Allergan | Collaborative arrangement, collaboration and license agreements | North America | Royalty
Revenues:
Revenue	$ 546	$ 435	$ 995	$ 934