Goodwill and Intangible Assets, Net - Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended	12 Months Ended
	Apr. 30, 2017	Jun. 30, 2013	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Expected useful life						7 years 6 months 18 days
Impairment of intangible assets						$ 0	$ 319,246	$ 15,724
Amortization of intangible assets						$ 158,400	$ 130,400	72,300
MuGard Rights
Finite-Lived Intangible Assets [Line Items]
Expected useful life		10 years
Impairment of intangible assets								$ 15,700
Makena auto-injector developed technology | Developed technology rights
Finite-Lived Intangible Assets [Line Items]
Expected useful life						8 years 9 months 18 days
Makena | Developed technology rights
Finite-Lived Intangible Assets [Line Items]
Expected useful life			7 years		20 years	7 years
Impairment of intangible assets				$ 319,200
Intrarosa | Developed technology rights
Finite-Lived Intangible Assets [Line Items]
Expected useful life	11 years 6 months