Goodwill and Intangible Assets, Net - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Finite-lived intangible assets:
Finite-lived intangible assets, cost	$ 953,855	$ 874,755
Finite-lived intangible assets, accumulated amortization	403,862	259,130
Finite-lived intangible assets, cumulative impairments	319,246	319,246
Total	230,747	296,379
Indefinite-lived intangible assets:
Total intangible assets, cost	953,855	953,855
Total intangible assets, impairments	319,246	319,246
Total intangible assets, net	230,747	375,479
Makena | Developed technology rights
Finite-lived intangible assets:
Finite-lived intangible assets, cost	797,100	797,100
Finite-lived intangible assets, accumulated amortization	390,724	255,754
Finite-lived intangible assets, cumulative impairments	319,246	319,246
Total	87,130	222,100
Makena Auto-Injector | Developed technology rights
Finite-lived intangible assets:
Finite-lived intangible assets, cost	79,100	0
Finite-lived intangible assets, accumulated amortization	4,697	0
Finite-lived intangible assets, cumulative impairments	0	0
Total	74,403	0
Intrarosa | Developed technology rights
Finite-lived intangible assets:
Finite-lived intangible assets, cost	77,655	77,655
Finite-lived intangible assets, accumulated amortization	8,441	3,376
Finite-lived intangible assets, cumulative impairments	0	0
Total	69,214	74,279
Makena IPR&D
Indefinite-lived intangible assets:
Indefinite-lived intangible assets, cost	0	79,100
Indefinite-lived intangible assets, cumulative impairments	0	0
Indefinite-lived intangible assets, net	$ 0	$ 79,100