Goodwill and Other Intangible Assets - Narrative (Details)	12 Months Ended
	Dec. 31, 2017 USD ($) product project	Dec. 31, 2016 USD ($) project	Dec. 31, 2015 USD ($)
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ 219,026,000	$ 195,300,000
Amortization of intangibles	61,443,000	65,713,000	$ 66,272,000
Impairment of intangible assets	92,613,000	$ 40,519,000	$ 30,376,000
Goodwill impairment charges	$ 0
Number of IPR&D projects abandoned (in project) | project	3	1
IPR&D
Finite-Lived Intangible Assets [Line Items]
Impairment of IPR&D projects	$ 24,596,000	$ 3,850,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life	1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life	30 years
Hi-Tech
Finite-Lived Intangible Assets [Line Items]
Number of marketed products acquired | product	2
Hi-Tech and VersaPharm
Finite-Lived Intangible Assets [Line Items]
Number of marketed products acquired | product	8
Product licensing rights
Finite-Lived Intangible Assets [Line Items]
Accumulated amortization	$ 205,549,000
Amortization of intangibles	58,335,000	62,375,000
Impairment of intangible assets	103,530,000	$ 40,519,000
Product licensing rights | R&D expenses
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	$ 10,900,000