Goodwill and Other Intangible Assets, Net - Additional Information (Details) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2019 USD ($) product	Mar. 31, 2019 USD ($)	Sep. 30, 2018 USD ($) product	Sep. 30, 2019 USD ($) product	Sep. 30, 2018 USD ($) product	Dec. 31, 2018 USD ($)
Finite-Lived Intangible Assets
Accumulated amortization	$ 243,190		$ 257,200	$ 243,190	$ 257,200	$ 217,603
Amortization of intangibles	9,375		13,613	30,390	39,985
Impairment of intangible assets				10,748	112,998
Impairment of goodwill	$ 0	$ 16,000	$ 0	$ 15,955	$ 0
IPR&D
Finite-Lived Intangible Assets
Number of products impaired | product	0		8	0	16
Impairment of intangible assets			$ 20,600	$ 0	$ 100,100	139,461
Product licensing rights
Finite-Lived Intangible Assets
Accumulated amortization	$ 227,678			$ 227,678		203,323
Number of products impaired | product			6	2	10
Impairment of intangible assets			$ 9,000
Impairment of intangible assets, finite-lived				$ 10,700	$ 12,900
Impairment of intangible assets				15,550		131,306
Impairment of intangible assets, accumulated amortization				4,900
Other Intangibles
Finite-Lived Intangible Assets
Accumulated amortization	$ 6,000			6,000		5,658
Impairment of intangible assets				$ 0		$ 5,235
Minimum
Finite-Lived Intangible Assets
Intangible asset useful life				1 year
Maximum
Finite-Lived Intangible Assets
Intangible asset useful life				30 years
Other Operating Income (Expense) | Product licensing rights
Finite-Lived Intangible Assets
Impairment of intangible assets, finite-lived				$ 10,700