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Selected Quarterly Financial Information (unaudited) - Impairments (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Future investments            
Impairment of equity investments       $ 20,973 $ 0 $ 0
Asset impairment       $ 4,020 375,172 $ 1,139
Impairment charges, Definite-lived intangible assets     $ 216,400      
Goodwill impairment   $ 122,800     $ 122,829  
In-process R&D            
Future investments            
Impairment charges, Indefinite-lived intangible assets     $ 35,900      
Kateeva            
Future investments            
Impairment of equity investments $ 21,000          
Business held-for-sale, Not discontinued operations            
Future investments            
Asset impairment $ 4,000