Goodwill and Other Intangible Assets - Major Categories of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Major categories of indefinite-lived intangible assets
Goodwill	$ 267,923	$ 283,879	$ 285,310
Major categories of finite-lived intangible assets
Accumulated amortization	(203,115)	(217,600)
Net carrying amount	211,601
Gross carrying amount	502,666
Impairment	(83,750)
Intangible assets, net	215,801	284,976
Impairment of intangible assets	29,497	231,086	128,127
Product licensing rights
Major categories of finite-lived intangible assets
Gross carrying amount	472,041
Accumulated amortization	(187,306)
Reclassifications	0
Impairment	(83,550)
Net carrying amount	$ 201,185	268,631	402,340
Weighted average remaining amortization period (years)	9 years 6 months
Impairment of intangible assets, accumulated amortization	$ 54,300
Impairment of intangible assets	29,297	88,492
Trademarks
Major categories of finite-lived intangible assets
Gross carrying amount	16,000
Accumulated amortization	(7,231)
Reclassifications	0
Impairment	0
Net carrying amount	$ 8,769	9,696	10,624
Weighted average remaining amortization period (years)	17 years 2 months 12 days
Impairment of intangible assets	$ 0	0
Customer relationships
Major categories of finite-lived intangible assets
Gross carrying amount	4,225
Accumulated amortization	(2,578)
Reclassifications	0
Impairment	0
Net carrying amount	$ 1,647	1,907	2,167
Weighted average remaining amortization period (years)	6 years 3 months 18 days
Impairment of intangible assets	$ 0	0
Other intangibles
Major categories of finite-lived intangible assets
Gross carrying amount	6,000
Accumulated amortization	(6,000)
Reclassifications	0
Impairment	0
Net carrying amount	$ 0	342	5,192
Weighted average remaining amortization period (years)	0 years
Impairment of intangible assets		3,133
IPR&D
Major categories of indefinite-lived intangible assets
Gross carrying amount	4,400
Reclassifications	0
Impairments	(200)
Net carrying amount	4,200	4,400	149,161
Major categories of finite-lived intangible assets
Impairment of intangible assets	200
R&D expenses | Product licensing rights
Major categories of finite-lived intangible assets
Impairment of intangible assets	$ 29,500	$ 91,600	$ 103,500