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Restructuring Charges - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Sep. 30, 2017
Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]      
Expected savings   $ 650,000  
Charges $ 24,922    
Forecast      
Restructuring Cost and Reserve [Line Items]      
Expected restructuring costs     $ 160,000