Collaboration, License, Co-Promotion and Other Commercial Agreements - North America - Royalty Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Collaborative arrangements
Revenues:
Revenue	$ 63,086
Collaborative arrangements | Collaborative arrangement, collaboration and license agreements | North America | Allergan
Revenues:
Revenue	61,599
Royalty | Collaborative arrangement, collaboration and license agreements | North America | Allergan
Revenues:
Revenue	449
Royalty | Collaborative arrangement, collaboration and license agreements | Canada and Mexico | Allergan
Revenues:
Revenue	$ 400
Calculated under Revenue Guidance in Effect before Topic 606 | Collaborative arrangements
Revenues:
Revenue		$ 51,865
Calculated under Revenue Guidance in Effect before Topic 606 | Collaborative arrangements | Collaborative arrangement, collaboration and license agreements | North America | Allergan
Revenues:
Revenue		49,951
Calculated under Revenue Guidance in Effect before Topic 606 | Royalty | Collaborative arrangement, collaboration and license agreements | North America | Allergan
Revenues:
Revenue		499
Calculated under Revenue Guidance in Effect before Topic 606 | Royalty | Collaborative arrangement, collaboration and license agreements | Canada and Mexico | Allergan
Revenues:
Revenue		$ 500