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Goodwill and Intangible Assets - Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]      
Goodwill $ 197,797 $ 197,797 $ 197,800
In-process research & development $ 23,000 $ 23,000