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Restructuring Activities and Charges - Schedule of Restructuring Related Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 20 Months Ended
Dec. 14, 2015
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Restructuring Reserve [Roll Forward]        
Charges   $ 3,637 $ 3,934  
Restructuring Plan, 2018        
Restructuring Reserve [Roll Forward]        
Beginning balance   4,583    
Charges   3,637   $ 25,600
Prepayments(1)   104    
Cash payments   (4,557)    
Non-cash settlements/adjustments   13    
Ending balance   3,780   3,780
Restructuring Plan, 2018 | Employee Severance and Related Benefits        
Restructuring Reserve [Roll Forward]        
Beginning balance   666    
Charges   534    
Prepayments(1)   0    
Cash payments   (1,117)    
Non-cash settlements/adjustments   15    
Ending balance   98   98
Restructuring Plan, 2018 | Lease and Contract Termination Costs        
Restructuring Reserve [Roll Forward]        
Beginning balance   23    
Charges   358    
Prepayments(1)   0    
Cash payments   (358)    
Non-cash settlements/adjustments   (2)    
Ending balance   21   21
Restructuring Plan, 2018 | Compensation Realignment and Other Retention        
Restructuring Reserve [Roll Forward]        
Beginning balance   3,636    
Charges   2,399    
Prepayments(1)   104    
Cash payments   (2,876)    
Non-cash settlements/adjustments   0    
Ending balance   3,263   3,263
Restructuring Plan, 2018 | Other        
Restructuring Reserve [Roll Forward]        
Beginning balance   258    
Charges   346    
Prepayments(1)   0    
Cash payments   (206)    
Non-cash settlements/adjustments   0    
Ending balance   398   398
Restructuring Plan, 2015        
Restructuring Reserve [Roll Forward]        
Beginning balance   122    
Charges $ 6,700 (36)    
Cash payments   (86)    
Ending balance   0   0
Restructuring Plan, 2015 | Employee Severance and Related Benefits        
Restructuring Reserve [Roll Forward]        
Beginning balance   122    
Charges 5,600 (36)    
Cash payments   (86)    
Ending balance   0   0
Restructuring Plan, 2015 | Lease and Contract Termination Costs        
Restructuring Reserve [Roll Forward]        
Beginning balance   0    
Charges $ 1,100 0    
Cash payments   0    
Ending balance   0   0
Restructuring Plan, 2015 | Other        
Restructuring Reserve [Roll Forward]        
Beginning balance   0    
Charges   0    
Cash payments   0    
Ending balance   $ 0   $ 0