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Severance and Restructuring Charges - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]      
Accelerated depreciation related to facility lease right of use $ 3,300    
Other accrued expenses 16,652 $ 12,450  
Restructuring charges   64,970  
Restructuring reserves 1,980 11,905 $ 0
Facility-related      
Restructuring Cost and Reserve [Line Items]      
Facility and other related exit costs 6,300    
Facility exit cost liability and employee severance cost liability 3,500    
Restructuring charges   10,133  
Restructuring reserves 1,971 2,931 0
Employee-related      
Restructuring Cost and Reserve [Line Items]      
Other accrued expenses 3,400    
Facility exit cost liability and employee severance cost liability 200    
Restructuring charges   35,704  
Restructuring reserves $ 8 $ 6,255 $ 0