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Commitments and Contingencies - Legal Proceedings (Details)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
claim
Jun. 30, 2020
USD ($)
Sep. 30, 2020
USD ($)
claim
Oct. 27, 2020
USD ($)
Dec. 31, 2019
USD ($)
Loss Contingencies [Line Items]          
Accrued legal settlements $ 14,430   $ 14,430   $ 2,080
Insurance proceeds receivable $ 11,250   $ 11,250    
Number of claims | claim 2   2    
Class Action Suit In New York Supreme Court Alleging Federal Securities Law Violations In Connection With IPO [Member]          
Loss Contingencies [Line Items]          
Accrued legal settlements $ 13,300   $ 13,300 $ 13,300  
Amount accrued for legal settlement $ 1,100 $ 900      
Number of claims | claim 1   1    
Litigation Regarding Employee Matters [Member]          
Loss Contingencies [Line Items]          
Amount accrued for legal settlement     $ 2,100