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Stock-based Compensation - RSU and PRSU Activity Narrative (Details) - shares
1 Months Ended 3 Months Ended
Mar. 31, 2020
Aug. 31, 2017
Dec. 31, 2020
Sep. 30, 2020
Forecast        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option and restricted stock units vesting rights, percentage     5.00%  
Performance-Based Restricted Stock Units (PRSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of awards authorized (in shares)   2    
Number of units per vesting tranche (in shares) 15,000      
Units earned in period (in shares)       0
Performance-Based Restricted Stock Units (PRSUs), One-Year | Year one        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option and restricted stock units vesting rights, percentage   50.00%   45.00%
Performance-Based Restricted Stock Units (PRSUs), One-Year | Quarterly        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option and restricted stock units vesting rights, percentage   5.00%    
Vesting period   30 months